Katy always has one of the best offensive and defensive lines. Filled with some 3 and 4 star players.
See above
Manvel has never had good lines. You can have all the 4 and 5 star guys on the outsides, but without the uglies upfront, it's game over(See Colorado- Oregon).
Duncanville on the other hand, has had the best lineman(3, 4 and 5 star guys) and some of the best athletes as well. No team in Dallas has been more talented overall than them.