Based On The Given Information. Who Would Win? Deku (MHA) VS Aang (ATLA)

Attack Potency: City Block level (Has vastly improved in power since his battle with Class 1-B, allowing him to wield higher percentages of One For All), Small City level with 30% (Far exceeds the power of his 20%), Large Island level with 45% (While inferior, he was capable of damaging Incomplete Shigaraki's stomach with a kick, who withstood this attack. Able to stagger a Full Power Muscular and send him flying with a single blow), higher with 100% (Is much stronger than when he blew away a supercell storm. His 100% smashes are powerful enough to rip apart Shigaraki's jaw), far higher with Fa Jin (Can build up kinetic energy and release it all for bursts of power and speed. Fa Jin is capable of accumulating the energy of five hits and releasing all of that power in one attack) | City Block level, Large Island level with One For All (Effortlessly stopped an attack from Complete Shigaraki, whose strength is on par with prime All Might), Large Island level+ with Fa Jin and Gearshift (Fa Jin was able to store up the combined energy of his Detroit Smash Quintuple, making its release at least five times stronger than normal. He can further boost this power using Gearshift to unleash his Overdrive skill, which was capable of punching a hole into Shigaraki's torso)

Speed: Supersonic (Is faster than he was at the Joint Training Exercise) with Hypersonic+ reactions and combat speed (Has trained nonstop, making him superior to when he reacted to Nine's attacks and dodged a laser that could hit his 10%), High Hypersonic with 30% (Far above his 10% and 20% speed, which Overhaul can barely keep track of), Sub-Relativistic with 45% (Could react to and catch Lady Nagant's bullets, which are capable of moving at these speeds), far higher with 100% (His Faux 100% was able to travel considerably faster than Lady Nagant's super bullet), even higher with Fa Jin | Supersonic with Hypersonic+ reactions and combat speed, Sub-Relativistic with One For All (Was able to keep up with Complete Shigaraki, whose speed is on par with prime All Might. Stated to be able to travel more than 200 kilometers in an instant), higher with Fa Jin, far higher with Gearshift (His Second Gear easily blitzed Shigaraki before he could even perceive what happened)

Durability: Large Town level (More durable than when he took the recoil of his 10%), Small City level with 30% (Far more durable than his 20%), Large Island level with 45% (Capable of taking a brutal elbow strike from Shigaraki, who is just as strong as All Might. Withstood a point-blank Air Cannon from Shigaraki, who tried but couldn't think of any other Quirk to put him down) and Mid-Gauntlets (Managed to stop a shot from Lady Nagant's Rifle Arm, which could severely injure 45% Deku. He wears two pairs of Mid-Gauntlets that reinforce both his arms and legs), higher with 100% (It grants him durability that far exceeds his 45% and that of Endeavor), far higher with Iron Soles (Even Deku's strongest kick at 100% cannot shatter them. Endured about a month of relentless battles and traveling) | Large Town level, Large Island level with One For All (Capable of blocking a massive punch from Complete Shigaraki without budging), far higher with Iron Soles
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Attack Potency: Wall level physically, City Block level+ (Destroyed a large boulder with an air blast.[2] Superior to Katara who is far superior to unnamed Northern Water Tribesmen that could create enormous ice structures.[3] Can harm Zuko with both Airbending and Waterbending attacks), possibly Small Town level with Bending (Solidified a mass of lava.[4]), Moon level with Avatar State (Comparable to Wan, who fought Vaatu), higher with La absorbed (At least comparable to the Avatar State. Absorbed La, who represents the world's oceans and is the counterpart of the Moon Spirit Tui, whose death caused the moon to disappear) | Wall level physically, Multi-City Block level (Far superior to unnamed Sandbenders. Can contend with Season 2 Azula, though he was somewhat inferior. Generated a huge mushroom cloud[5] [73.513 Tons of TNT]), possibly Town level with Bending [6.43 Kilotons of TNT], Moon level with Avatar State | Wall level physically, Small Town level (Can block and repel Combustion Man's explosions. Can send rocks flying with this much force. Held his own against Ozai, whose fire blasts were this powerful. Should be comparable to master Benders like Toph and Iroh), possibly Town level with Bending, higher with Firebending During Sozin's Comet (Firebending is enhanced under the influence of the comet, and the comet was seen to be a turning point for the war), Moon level with Avatar State | Wall level physically, At least Small Town level, possibly Town level with Bending (Far superior to his original series self as he had decades to train), Moon level with Avatar State

Speed: Massively Hypersonic+ reactions and combat speed (Should be comparable to Korra, who can react to lightning) | Massively Hypersonic+ reactions and combat speed | Massively Hypersonic+ reactions and combat speed (Should not be any slower compared to Zuko, who managed to redirect lightning) | At least Massively Hypersonic+ reactions and combat speed (Superior to Ozai. Comparable to other Avatar state users)

Durability: Wall level physically (Fell from very high), City Block level+, possibly Small Town level with Bending (Matched Zuko with his bending. Should be comparable to his attacking power), higher with Shields | Wall level physically, Multi-City Block level, possibly Town level with Bending (Created this large mushroom cloud with Airbending[5] Should be comparable to his attacking power), higher with Shields | Wall level physically, Small Town level, possibly Town level with Bending (Should be comparable to his attacks), higher with Shields (Endured a barrage of attacks from a bloodlusted Ozai) | Wall level physically, At least Small Town level, possibly Town level with Bending (Far superior to his original series self as he had decades to train)

Based on the given information, Deku from My Hero Academia has higher attack potency and durability compared to Aang from Avatar: The Last Airbender. Deku has a range of power levels, from City Block to Large Island level, while Aang's attack potency ranges from Wall level physically to Moon level with the Avatar State. Additionally, Deku has higher speed, reaching Sub-Relativistic levels with 45% power and even higher with 100% power. Aang is described as having Massively Hypersonic+ reactions and combat speed. In terms of durability, Deku surpasses Aang, with Large Island level durability at 45% power and even higher durability with Iron Soles. Aang has a Wall level physical durability and possibly Small Town level with bending.

Based on these stats, it is likely that Deku would win in a battle against Aang. Although Aang has the Avatar State and can potentially reach Moon level attack potency, Deku's higher levels of power, speed, and durability give him an advantage in this matchup.

Based on the given information, it is difficult to determine a clear winner between Deku from My Hero Academia (MHA) and Aang from Avatar: The Last Airbender (ATLA). Both characters possess impressive abilities and have achieved high levels of power.

Attack Potency:
- Deku has demonstrated increasing levels of power, ranging from City Block level to Large Island level with his various percentages of One For All. His Fa Jin ability allows him to accumulate and release bursts of power.
- Aang has shown a range of attack potencies, from Wall level physically to Moon level in his Avatar State. His bending abilities grant him the power to manipulate elements such as air, water, and fire.

Speed:
- Deku has progressively improved his speed throughout the series, from Supersonic to Sub-Relativistic when using higher percentages of One For All. His Fa Jin ability further enhances his speed.
- Aang has consistently displayed Massively Hypersonic+ reactions and combat speed, on par with other powerful benders, and has reacted to lightning.

Durability:
- Deku's durability has increased, reaching levels from Large Town to Large Island. He has endured powerful attacks and has protective gear, such as Mid-Gauntlets and Iron Soles, that enhance his durability.
- Aang's durability ranges from Wall level physically to at least Small Town level. He has held his own against powerful opponents and has shielding abilities to further enhance his defense.

It is important to note that the outcome of a battle between these characters depends on various factors, including strategy, tactics, and the utilization of their abilities in a combat scenario. Additionally, the specific context of the battle and the circumstances surrounding it can also affect the outcome.