I quited using the IS2 like a year ago when I saw a P4 penetrate it frontaly 3 times one after another. Experience has led me to believe the claims that it has the same armor as the KT are false and its actually closer to a Tiger I or its someway nulified by the high penetration of german TDs. In fact, I've seen KV-1s bounce more shots from ATGs and light TD than any IS2 (and thats why those are my tank of choice when facing compositions with lots of light AT)
Sucks we don't have any reliable stat source. Maybe I'll lab it one of these days with the editor.
Also, there is no need to be rude
We have reliable stat sources. And yes the KT has the same frontal armor as the IS2. (375)