Yes we need some more Spits badly!
Mk. I, 1938 - Battle of Britain Classic.
Mk. II, 1940 - Upgraded Mk. I, the Spit that all those mean 190's picked on in 1941.
LF Mk. IX, 1943 - The most common Mk. IX by a wide margin. Many had clipped wings for greatly improved roll rate. Merlin 66 engine gave over 4500 fpm at S/L and speeds up to 20 mph faster than F. Mk. IX (current AH Mk. IX) below 18,000 feet. With 130/150 grade fuel, the Merlin 66 could produce 2000 hp for even more fantastic performance.
Mk. VIII, 1943 - The plane that the two-stage Merlins were intended for (Mk. IX was V with a two-stage Merlin wedged in there). Extra internal fuel in the wing roots, fully tropicalised, retractable tail wheel. According to Jeffrey Quill (chief development test pilot) the Mk. VIII was the best Spitfire "from a pure flying point of view". Built in F, LF, HF variants with similar engines (Merlins 61, 63, 66, 70) and performance to Spitfire Mk. IX variants. Used primarily in overseas commands (Asia and Africa).
Mk. XII, 1943 - The first production Griffon Spitfire, a modified Mk. V airframe. Single-stage engine made it a low altitude specialist. No match for the Mk. XIV but still a great performer.
Mk. XIV, 1944 - Simply the finest air-to-air fighter to see service in WWII. A Spitfire redesigned to handle the power of the Griffon. Two-stage supercharger gave it superlative performance at low and high altitudes. Despite immense power, it retained much of the carefree handling and responsiveness of the earlier Spitfire Marks.
Performance information available here, courtesy MW of the 4th FG.