So. Here are the promissed pictures:
As the B variant only has a different center turret the most screenies are from the A variant:
A side total view which illustrates the major changes:
Here you see the different hull plating, armament and additional rcs thruster.
A close up of the front side. With the additional bridge window.
Details of the new turrets.
The extended engine section.
The heavy turret of B variant.