Hello aspirant,

Hope you are doing well.  See all the three exams have same syllabus and all the three exams gives you very good college to you if you score good marks. Also if you can score good marks in one exam then all the exams are at same level only. Though if you take my opinion then BITSAT is very easy and after that comes TSEAMCET and after that JEE main.

Hope this helps.

If any queries feel free to ask 

All the best!!

Regards

TS eamcet is easier to get good rank when you have been studying in orientation of jee mains.

But when you are studying for jee mains you shall try to get good rank in jee mains because the oppurtunities I mean good oppurtunities and good concept will be in nit rather than normal colleges of TS eamcet.