The M-10 had the 76mm gun and was actually far superior to the T-34 we have here (and the PzIV) balistically.
Being a Tanker for 25 years and still going, and a WWII Armor buff all my life, The M-10 never had a 76mm gun. It had the 3 inch gun and in late 1944 the British mounted the 17pdr gun onto there's. The M-36 had the 90mm AA High Velocity gun. This was the only armored U.S. vehicle before the M-26 that could knock out a Panther or Tiger at long range. The M-18 Hellcat had the 76mm gun mounted on it. This also used the new 76mm ammo HVAP (high-velocity armor- piercing). Infor came from "The Complete Illustrated History of British, American and Commonwealth Tanks, 1939-1945" (Peter Chamberlain and Chris Ellis) and "Combat and Development History of the Sherman Tank and All Sherman Variants"(Michael Green) Also in another Book I have which I can't find at the time, it deals with the Russian lend lease tanks. They, the Russian crews loved the Sherman for the simple reason ( this coming from a few Russian drivers), "You turn the engine switch and it started every time, we could go weeks with out a break down compared to the T-34's." Now armor and 75mm main gun, well, you can't say much about them. Also the Russians got all of the Diesel engined Sherman until mid 1944.
There is my 2 cents worth.
Keep up the great game and please add more armor, like the Comet, the Cruiser Tank Mk VIII, the Churchill tank, KV-1's. M-36's, M-18's
Thanks