Are there major differences between JEE Main only classes and JEE Main + Advanced classes apart from question solving? As per my knowledge advanced level questions are done in those classes. Are there any other differences?
No, not as such. The syllabuses are almost same as that of the 12th class, the chapters are mostly same. Just difficulty level changes a bit, so they'll definitely be taught in jee mains classes as well. But there are some topics that are unique in Jee advanced like nuclear chemistry and thermal physics. Maybe in the classes of mains these topics are taught beforehand to the students or maybe not, that depends on the institute.
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