There's been a lot of opinion and anecdotes about the relative merits of the Tiger and the Sherman Firefly in this game. I thought some hard numbers were in order, so I went to the scores page and calculated kill ratios between the different tanks going back the previous five completed tours.
Here are the cold, hard facts, without the hysteria.
For the last five months the Tiger has a kill ratio against the Sherman of 1.13, which means the Tiger killed the Sherman 13% more than the Sherman killed the Tiger. This sounds bad to people, but you have to remember that both the Tiger gun and the Sherman gun are extremely effective - including against each other! So the difference in armor between them is less of a factor.
However, it's not just Shermans vs. Tigers. Here's how the other lineups went:
Tiger ratio vs. Panzer:
4.78
Sherman ratio vs. Panzer:
2.99
verdict: Tiger is 60% more effective against the Panzer than the Sherman is
Tiger ratio vs. T34:
18.9
Sherman ratio vs. T34:
8.89
verdict: Tiger is 113% (more than twice) as effective against the T34 than the Sherman is.
My read of the data goes like this. The Tiger and Sherman guns are both very, very powerful. Against each other the guns are powerful enough to get the job done, and the armor difference between them is less meaningful, so the kill ratio is fairly close to even, though the Tiger still has a modest edge.
The ratios against the *other* tanks, however, primarily reflect the ease with which the less effective guns of the Panzer and T34 fare against the Tiger and Sherman armor. These numbers show that both the T34 and the Panzer have a significantly easier time defeating the Sherman than they have of defeating the Tiger.
The Tiger is still the most effective tank vs. tank machine in the game. Is it worth 30 or 40 perks when the Sherman is going for 7 or 8 perks? I don't really think so. I think that the Sherman should be perked more like 20 points to the Tiger's 30 or 40. The Sherman is too good against the other tanks - and too good against the Tiger - for the huge disparity in perk costs.
I think it costs too much compared to the Sherman, but the numbers don't lie: the Tiger is still the toughest tank killer in the game.