Hmmmm....kind of.
Pex A and Pex B tubing are identical in OD and ID....... same flow rate, are both are F1807 compatible (crimp connection standard)
All Pex A is F1960, (Cold expansion connection standard), and more malleble. Pin holes in Pex A can be fixed with a heat gun, cool fact. It is made opaque, and colored after. There are issues with colored Pex A.
Some Pex B is F1960 compatible, rare, but they exist....and tougher.
The increase in flow is due to the ID of the crimp vs expansion fittings, not the tubing.
IMO expansion fittings in many circumstances have several issues with durability when it comes to installation, and enviromental concerns such as freezing.. Crimp's only issue is reduced flow.