Tata Sky delivers much superior quality than that of Airtel TV.
It is very rare that a TV showroom uses Airtel TV to showcase their HD TVs. It is very difficult to impress the customers with Airtel HD Channels. You always find TV showrooms showcasing TataSky HD channels because it works for them.
If you find both AirtelTV and TataSky being showcased somewhere, you can clearly identify that the quality of HD channels in Tata Sky is much better than that in Airtel TV