Correct. The concept of "Tez" (meaning Fast in Hindi) was to provide quick, short snippets of news that convey the entire topic, instead of long reports on the same. It was intended for "busy people" who dont have much time to watch news, and want to cover the maximum topics in a limited time. Hence, in spite of TV Today network having AajTak already, they launched Tez as a channel too.
@Vijay rajput the correct way of getting an answer to such query is to see the relevant section, i.e. Dish TV. I have checked for you and yes, Tez is available on LCN 677.
Source: Dish TV Channel List Updated on 12-01-2018