Yes bro, i have just started using Tatasky Binge+, not much explored yet, but both have their own sweet prons & cons.
When you talk about HD picture quality, Airtel slightly has edge over Tatasky Binge+. SD picture quality, Tatasky Binge+ is way ahead than Airtel. Sound Quality more or less same, the problem with Tatasky Binge+ is that, there is uneven sound in some channels. UI also more or less both are good, and coming to Remote, Airtel Xstream is way good than Tatasky Binge+. Coming to recording, Tatasky Binge+ is providing basic recording for free and which is not there in Airtel Xstream. I don't have surround system to check Dolby or etc here in my hometown so cannot comment much on that, and Prime video, Hotstar etc apps clarity is more or less same in Both.
Please let me know if you need any more info. Happy to help.