Whenever you are writing a comparison/contrast paper (paragraph, essay, research paper), you need to plan it out very carefully on paper first.
1. Write all the information about one of your topics on one page.
2. Write all the information about the other topic on another page.
3. Then put them together in this order:
2. All about topic A
~~~2A. detail 1
~~~2B. detail 2
~~~2C. detail 3
~~~2D. detail 4
~~~2E. detail 5
3. All about topic B
~~~3A. detail 1
~~~3B. detail 2
~~~3C. detail 3
~~~3D. detail 4
~~~3E. detail 5
The number of details for each topic will vary depending on your main points. I would include comparisons (how they are similar) in the introduction and conclusion, but sections 2 and 3 and all those details will be stating and explaining how they are different.
There are two recognized patterns for writing comparison/contrast papers. One is casually referred to as "zig-zag,” but can be very confusing for the reader if you don’t use transitions effectively. The other is topic-by-topic (which is what I've outlined above) and is much easier for the reader to follow.
See http://leo.stcloudstate.edu/acadwrite/comparcontrast.html for further help with comparison/contrast writing.
Once you have organized your information, please re-post if you’d like feedback from someone here.
Can you give more detail on websites instead of google
When you open each set of search results, you'll find many articles about each topic. I'd choose two good biographies of Julius Caesar (the man), and at least two good sites that deal with the play. Pull your details from those four websites.
If you have problems reading and understanding the play, be sure to use this site: http://nfs.sparknotes.com/juliuscaesar/
Once you go into an act and a scene, you'll find the original language in the column on the left and a modernized version on the right. You will understand the play much better if you use this.