I don't know the answer to your question, but, would just say this: if traveling to India in B-class, I'd never choose Air India. If you want an Indian airline, I'd choose Jet, and if you are OK with US airlines, then I'd go with United which does a direct from EWR to both BOM and DEL, or Delta which doesn't have a direct (they used to but took it away -- Boo!) but does connect to both BOM and DEL via AMS.

I've flown Air India from EWR to BOM once. I'll never do it again. My parents have flown in F on Jet and said it held its own to F on Emirates, which is high praise in my mind.