They have the same rules at 42 to code, 80 columns, 25 lines for a function, ect...
Where Epitech is better is that from the middle of the third until the end of the beginning of the five year, you have to work on a end study project. You need to prepare everything before coding, database schema, how will you do your tests, ect..
Even tough I find Epitech better than 42 on this, Epitech is also lacking a lot of things. Some teachers to explain to you the best practices, code review, ect.. would be really nice.