This is the comparative: https://tanks.gg/com...?t=rudy~t-34-85
It's a tech tree tank you can buy for gold, everyone can buy it at any time, now this tank is damn stronger than the standard T-34-85. Not only that, it also beats Rudy everywhere.
It has a small drawback though, the terrain resists are worse, but hardly noticeable as it reaches pretty much the same speed as the other two, the acceleration it has is just enough for anything you'll need to do.
I don't care if premium tanks have certain strengths compared to tech tree, but as long as it trades something else. For example: https://tanks.gg/com...es-03?t=strv-s1
Here you see UDES-03 has 300 less DPM, but in exchange for 0.5 dispersion which is A LOT. At the range you have to fight this means sometimes you miss your target entirely. UDES has much better speed, but that's the trade for having less armor, so on UDES you can't take shots as everyone overmatches you, but on a Strv S1 you can autobounce 85mm and worse guns which many players sport in that tier.
Now T-34-85M doesn't trade gun handling for more DPM, it's the same, and even better at aiming than the standard T-34-85.
With all the OP tanks including the Chieftain nowadays, I wanted to make sure you don't miss this.