The Spit LF Vc was last V and is a 1942 bird and not representative for the V that fought in many famous battles in North Africa and over the Channel in late-1940 and 1941 against 109Fs and later the 190A. The AH Spit IX is a 1942 version meant to fill the slot for an early IX vs 190A time frame. The Spit XVI is for all intents and purposes a clipped wing Spit LF IX and fills that role for late war IXs. There's also the VIII for a full wing Merlin 66 Spit.
LOL Thanks for the Spitfire education

You prove the point. What you just typed is what's been said by me and others any number of times regarding the Spit line up. It's representative even if not exactly historical. Having flown the 41 Spit Vb in a 43 scenario, it was certainly evident it was not an LF V.
The point is the same for the 150 octane fuel. Players bemoan Runstangs, Spit 16s, etc. Now imagine the whining if they had the performance from 150 octane. I truly believe we don't have 150 octane for that very reason, play-ability.