Slimm, I gotta disagree. Sure it helps the game play by differentiating the plane types however, a game built with the basis of being a flight simulator, I'd rather see no differentiation in the tag. I like being able to see it's a 51, or a 109 but I would like some advantage in flying the variants unrecognized. Pilots would not be able to tell the difference of certain variants, even up close. I'd like to see the F4U4 or Ta152 simply show up as F4U or FW190.
On the flip side you have to consider the main game style. Is the Hurricane Mark I any more disadvantaged not knowing it's a Spit XIV he's engaging? Further advantage goes to the Spit.