As I see it, the biggest diff will be the fact that you stand to earn miles on the 9W flight (its JetKonnect, btw, not full service Jet Airways, so you'll have to buy meals, water, etc on board...and remember that its a 3 hr (???) flight). Well, you could book the Indian resident fare, but if its easy to spot that you're not Indian, it will be a BIG problem. I wouldn't endorse that approach, though!

Seat pitch on JetLite is 31". Jet Konnect should be the same (normal Jet Airways economy seat pitch is 32".