Given that the only difference between the Peregrine and the IS-3A is the skin, why does the Peregrine have noticeably higher stats in literally all categories? These aren’t tiny differences either…2% winrate is significant, as is 15% higher DPG. The number of battles is similar so it’s not a statistical fluke due to a small sample size.
My only guess is that because the Peregrine was a limited release (and functionally identical to the IS-3A), the people who bought and played it are more likely to be tank collectors (who tend to be better players than average). Sounds iffy at best but I cannot think of any other possible explanation for the discrepancy in stats.