I said that i have preformed 12 fights and IS-2 loses 2/3 of them. If this is not one sided, I don't know what is. Also keep in mind that when fighting from the side Tiger will beat IS even more
again it's statistical oddities basically when u trow a coin u don't get always head and coin in sequence , for example in the test i did with tiger vs is 2 the is 2 won 4 time in a row by a small margins and i obvs not gonna say is2 opop cause of some lucky steak, i uderstand that if i did the test 100 1000 10000 etc it would follow the middle as u can even do the math for the engament
at mid range is2 has 76,7% to pen a tiger while the tiger has a 64,4% to pen a is 2 but fires around 1 second slower , so it get's around 1-2 shoot more depending on how often they pen
and the is2 has the obvs advantage of having an aoe of 5 instead of 3,5