mora,
There is that whole "speed" thing that the Tempest does better than the Spitfire Mk XIV as well. You know, the Tempest's 385mph against the 360mph of the Spitfire.
Sure, the Spitfire can do 448mph at 27,000ft, but as we both know, low altitude performance is much more important in AH.
The Tempest also has better high speed handling, hell, the Spitfire XIV can't even maintain level flight at 450kts indicated airspeed. It rolls left no matter the trim or pilot, so said the Spit XIV pilot at the 2001 Con.
I don't know where the idea that the Spitfire Mk XIV is a Tempest on steroids came from, but a lot of people seem to think that and its wrong.
Laz,
What you say may be true in the arena that you'd build, but in an arena that has free P-51Ds, La-7s, Fw190D-9s and Bf109G-10s massively perked Tempests, F4U-4s, Ta-152H-1s and Spitfire Mk XIVs is silly. They are only marginally better than the free rides. They need to be controled, not eliminated.