Is the data for spz12-3 still WIP?

Why is the depression angle of the SPZ12-3-106mm gun worse ° than the FIAT6614? I can understand if it is affected by the frontal turret, but why it is only -6° on the side

And then the gunner’s sight is also the same as the “openwork iron ring” of FIAT6614 at 1.9x-3.5x, is this correct?