Hi,
If you want to compare between between who gets more benefit of reservation ews or obc , then the answer is definately the ones having obc category reservation as the seats are generally more for obc candidates as well as their  cutoffs are also less whereas ews have generally low number of seats and also cutoff is more than obc category.
You can also click on the college predictor link mentioned below to find a suitable college https://medicine.careers360.com/neet-college-predictor?icn=QnA&ici=qna_answer