Do not lie, SU-100 ≈ Jagdpanther.
They have similar armor and gun, gun Jagdpanther better, but the SU-100 is lighter, more mobile and easier in service
Jagdpanther and SU-100 had roughly the same speed... 46 km/h vs. 47 km/h.
The gun on the Jagdpanther and Jagdpanzer IV was superior in reload speed, flatter trajectory, accuracy. Add to that superior ergonomics etc. and the Jagdpanther/ Jagdpanzer IV are effectively the better performing machines.
The frontal armor on Jagdpanther, Jagdpanzer IV with the long barrel and Su-100 was 80mm, 80mm and 75 mm - all roughly the same and with comparable sloping. No clear advantage for the SU-100.
Actually I consider the Jagdpanzer IV the better machine as it had a height of only 1,85m. The SU-100 had a height of 2,24m and thus is spotted more easily. And any gun over the calibre of the Jagdpanzer IVs 75mm was pretty much overkill.
Could we get this on topic? I´d like to see the game balanced rather than new units.