Source: Reddit, as seen in a thread by backjacker
„Firepower:
Not bad, the RoF is noticeably slow, especially coming from an STB player. Gun has pretty good dispersion/handling stats. It will go where you aim, and combined with the good shell velocity, leading targets even 500 meters away wasn’t hard. Gun is really good.
Mobility:
I was really disappointed. The traverse doesn’t look bad on paper but I think the soft stats made it bad. It’s way more sluggish than the STB, I don’t think I ever hit the top speed on flat ground.
Survivability:
Just like the STB. Your turret can bounce lucky shots (provided they don’t laser your tumor) but don’t rely on it, or your hull.
These were my impressions.
TL DR; medium with gun of a Leopard, survivability of the STB, and mobility of the E50M.”