Here are some hard stats on the the stug E i pulled from the files, since the COH2 stats site has not been updated last time I checked
gun
Damage: 80
Penetration: 45
AOE distance: 1.25
range: 50
reload: 4 seconds
health
HP: 320
Armor: 120
It does have slightly larger AOE distance than the stug (which has 0.75), but the unit does seem to be lacking
i have all these stats listed here:
https://docs.google.com/spreadsheet/ccc?key=0ApmrrrPr20ncdEpuSHcxNko1VGVFYjczYXpFZWhqOHc#gid=5
AOE radius is actually 2.5, what youve listed for both stugs is actually the far AOE distance (typically, half of the AOE radius). also, the stug G has a reload of 4, the stug E actually has a reload of 5.25.
it is worth mentioning its scatter though as that is quite important for AI tanks. 2.15 distance scatter and 7.5 angle scatter, identical to an ostwind.