Wait... Ryu = Ken... what?? I can understand the sentiment of NOT wanting player redundacy, but to insinuate that the shotos "play" (flat statement) identically just shows that the reviewer isn't a fighting game fan, at all. A more accurate, and fitting, analogy would have been mentioning the Kobun ("Servbot"), Roll, and Adamantium/Bone Claws Wolverine gaffs from MvC2.
And to be fair/accurate, Ryu & Ken haven't been pixel-pallet swaps since the pre-SSF2 days. They may look similar, but they move(d) differently, take different levels of damage from received attacks, and have different ranges and effects to their special and super moves. Heck, there have been tweaked subtleties in their regular movesets since SF2, & that was released practically 20 years ago!