pz4 > sherman LOL? basicly the same tank but sherman has HE shells aka lolwipes. Try again.
ive used the pz4 a lot recently, it has horrible main gun accuracy, shitty pen (you even bounce often on t34 and shermans.. after missing 2-3 times in a row LUL!)
pz4 can kill inf very good, but for its costs to fight other tanks.. just no LUL
and the problem with the tiger is the comet spam, it feels like the comet is better in most stats, but still cheaper and you can get more of them..