MASN has a way better camera angle on the pitches for the viewers, so it's a lot easier to judge the strike zone as well.
I wish TBS would actually have a useful camera angle, behind the pitcher rather than to the right of them.
When I was at the game, I noticed they had 4 cameras out in CF (Nats, Cards, TBS, not sure of the last one). I'm guessing MASN gets first dibs on the spot they want so they get the best angle.