MODERN. TANKS. BRO, yeah the french had tanks that surpassed the german tanks in both firepower and armor, but late war the germans still had the best tanks.
german tanks had the best suspension and could therefor be heavier and faster, whilst providing a smooth ride, but allied tanks could shoot whilst moving thanks to gyroscopes, had a lot higher quality of steel and therefor where more durable...
I guess it isnt as easy and obvious about ww2 tanks as well. I know a tiger crew member, and he was pissed because the machine broke down every few hundred meters ^^