Pretty sure the 57mm does 160 damage like the other ATGs so the only thing worse about it is penetration and probably reload compared to the pak 40, but it's got a nifty vet 1 ability.
Wish I could have it over the pak's target weakpoint which has a nasty habit of not going off or striking the ground or being useless against moving targets which doesn't seem to affect the StuG which is the best unit to use TWP from.
Also the AP rounds in CoH 1, while good had a stupidly short duration where you could only get 1-2 shots off depending when you activated it.
It is not that short and AP round was insanely high damage, a Panther can be taken down in 4 shot.