While we're at it: It isn't completely uncommon to even give different names to variants of the same plane. In WC Arena we have the additional code names for the variants (Blade, Vanguard, Cavalier etc.) and in real life we have the F-84 that was called Thunderjet, Thunderstreak, and Thunderflash. Prototype variants included also Thunderscreetch and Thunderceptor, of which only one got a new number. But while this is interesting I don't think it will get us somewhere with this thread unfortunately.