Why does the Boxer MGS have irst auto tracker but not the CT-CV 105HP?

What is the difference between these two other than the hull?
They appear to have to same optics / turret / gun.

Is this another case of German bias? Such as how the Pzh2000’s M107( PF) round is 400 meters faster than the Vidar’s despite being the same cannon and shell?

No, German players suck so much that they need a-historical buffs to be competitive