Again, I don't know the armor formula, but this clearly makes E-50 one of the best rammers in the game, unless THE best rammer. KV-5 has 170 front armor contra it's 120 but while having almost third less kinetic energy, so I really don't know what's actually better.
In terms of anecdotal evidence, one of my friends saw an E-50 ram an E-75 to death when they were both at around 450~ health, so yes I'd say it's a pretty damn good rammer.
In other news, the WoT forums are currently raging about the T34's nerfs on the test server, and Russian bias and all that shit. I'm curious if anyone else here has tried it and had any thoughts on it, cause I just drove it and it still seems like a god damn rape machine to me. It's like a T29 with a slower turret mounted with a super cannon - when its loaded with gold shells it fires little bits of hades.