Amrita Coimbatore is better than amrita banglore because they have good professors who can give you a better LOR's. You can switch to hostel and day scholar as u feel like. Coimbatore campus has h better infrastructure so it's up to you to make the best of it.

Hello,                                                                           As per every year process rank both have good features but you have to visit the both and decide the according to your reliability.