For quick reference:
https://docs.google.com/spreadsheets/d/1H5z6szCfhmAAnDprmgwLzc-viZg4HPhKZshNLErvnck/edit#gid=1638665511
https://i.serealia.ca/files/coh2dps.html#76
Pen
Pak40: 210/200/190
Zis: 200/190/180
57mm: 150/140/130
57mm HVAP: 225/210195
Rak: 200/190/180
Pounder: 210/200/190
RoF = Reload + Wind up + Wind down + Ready aim + Fire aim
Winds are delays that are generally tied to animation sequences. If i get it right, wind up plus aim times are required before firing while wind down is performed after shooting.
So, let's say time to shoot.
TTS
Pak40: 0.57
Zis: 0.445
57mm: 0.56
Rak: 0.445
Pound: 0.57
ROF:
Pak40: 4.87
Zis: 5.875
57mm: 4.31
Rak: 4.995
Pound: 4.87
Tracking
Rotation speed/Arc
Pak: 14/30°
Zis: 12/30
57mm: 18/40
Rak: 12/35
Pound: 12/30
Again, I am only comparing the 320 mp ATs. You may include the others, but I personally do not prefer to do so since I don't think they are fair comparisons.
According to the modding tool:
Pen(the higher, the better):
Pak40: 210/200/190
Zis: 200/190/180
Pounder: 210/200/190
AOE pen(the higher, the better):
Pak40: 105/100/95
Zis: 100/95/90
Pounder: 105/100/95
Reload(the higher, the worse):
Pak40: 3.5~4.1
Zis: 4.425~4.425
Pounder: 3.5~4.1
horizontal and vertical tracing speed (the higher, the better):
Pak40: 14(horizontal);25(vertical )
Zis: 12(horizontal);12(vertical )
Pounder: 12(horizontal);25(vertical )
Wind up and down(If I got what you said, then the higher, the worse?)
Pak40: 0.5(down);0.25(up)
Zis: 1(down);0.125(up)
Pounder: 0.5(down);0.25(up)
Here are couple more differences, but I have no idea how they work:
Behavior -- reaction radius:
Pak40: 0.4
Zis: 0.5
Pounder: 0.4
Flinch radius:
Pak40: 0.5
Zis: 0
Pounder: 0.5
Moving end/move start time(I assume the higher, the worse):
Pak40: 0.75(end);0.6(start)
Zis: 1(end);1(start)
Pounder: 0.75(end);0.6(start)
Accuracy, Fire aim, and ready aim are the same for all of them.