IS 2 is clear winner!!! IF you dont belive check out site The Russian heavy tanks section IS 2 versus Tiger 2 are about equal at all ranges except IS 2 can get turret on target much quicker giving CQB atvantage and tiger 2 is extremely ineficicient to produce 1 tiger 2 for 5 IS 2 thats just plain stupid and mere 400+ were built and tiger 2 cant go 400 yards without breaking down or getting stuck in mud hehe.

IS 2 armor is much better tha tiger 1 which has 100mm max front hull and turret armor thickness at 0degress slope while IS 2 is 132 mm sloped frontal hull and well sloped 162 mm turret front. IS optics allow for engagemant of targets up to 3000 yards plus effectively.while the tigers prospects are very poor and unlikely at that range versus IS 2. An IS 2 may be able to penetrate a tiger 1 frontal armor plate from 1500+ meters and its slightly worse optics whould not make much differnce at all espesialy for skilled gunner. IS 2 can penetrate panthers frontal hull armor plate from 1200 meters virtualy every time while the panther may penetrate the IS 2 frontal armor plate from only 600-700 meters thats huge tactical advantage for IS 2. IS 2 is the best tank of WW2 it has much better and thicker armor than the panther in reality unlike in ro where their armor is about the same.

Ww2 battle tanks t 34 vs tiger