The Magach 6A should have same pen as the other ones

Why does the Magach 6A have less penetration then the other Magachs
Its cannon is 1 to 1 with the other Magachs like the Magach 3 or 6 It should have the same penetration as the other Magachs

Best Pen . . .

oooh, guess the FOMO/HYPE crowd already bought them all . . . . sorry