Stop using history arguments. StuG and Panzer IV had the same gun, Panthers were known for knocking out T-34s from 2km away and the ISU could fire once every full moon. Elefants were only "common" during the Kursk operation. This all isn´t in the game.
How is this relevant when a HEAVY tank has even less armor than a jp4?
ebps has units within "races" and when you go in "combat" you will find a reference to weapons in hardpoints. if you right click you can go to reference to see weapon stats