Which AITS should I join for IIT JEE Resonance or Allen ? What if I join both the test series for more practice ?
You should join only one test series program and solve it properly because one AITS program is enough.In my opinion RESONANCE is the best coaching institute for AITS when compared to ALLEN.As pattern and level of questions are same when compared to IITJEE questions.You can consult RESONANCE for more information.
Good luck.

Both these institutes are good you can join any according to your comfort.
If we compare both the institutes then resonance will help you to analyse your preparation level better as there number of students are more. So, you will get to know where you stand among your competitors.
All the Best!!
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