I have made profiles on both, and have different experiences.
On shaadi.com you need to get paid membership to chat someone, only u can do is search, send connect req and see their profile pics with free version. you can only chat if the person who sent you request have a membership.
I'll share my data to give you some idea. First of all let me tell u, I have a decent profile, decent family, salary, looks. Looks little bit good than average.
So on shaadi.com I have received total 12 requests in 4 months. 21 got accepted which was sent by me. Total matches - 21+12 = 33
On jeevansathi.com , one plus point is you can chat with free version.
So here within 1 month, I have received 7 requests, And 12 got accepted with was sent by me. I sent total 41 request, out of which 19 declined by them.