t44-85 and a panther
It was just my understanding that the e50 was supose to have the kt 88mm, the e75 was to have the new 105mm and the e100 was to have the ht 126mm....The e50&75 were to usedmost of the kt hull jigs( the front armor was to havedifferent angles) so as to not interupt production....My guess is the e75 would have more or less kept the kt turret but they may have both used the same turret just, different guns and armor thinkness.