hey .. i think that i am the person to answer all your doubts.. exactly 1 yr ago i asked the same question.. i took a drop and now as an ex- resonance student i am very happy to help you.
resonance is the better place because they are very serious about their work.
if you are thinking that always bansal has the most toppers.. the answer is simple. the smarter people go there because thay have heard more about them..
reso is upcoming only now, and this year i expect that they will surely have atleast 1000 selctions.
in a few years they may even beat bansal. dont have any doubt about this. join reso. especially if you get the higher batches..
they teach everything that is in the syllabus very well, and they go just a bit deeper than the level of jee, which i fel is perfect.
the problem with bansal is that they go tooo tooot oo far in depth and students just cannot understand it. the chemistry in bansal is probably the highest of all.. my freinds who studied there always complianed about it.
whereas in reso i never had a problem in chem.
so dont hesitate..