As nobody else has answered...
The original source was Patrick Didier's model which was released at the very beginning of CFS3. Mathias then did the cockpit for MAW, and the model was reworked to the current standard. GregoryP of AvHistory did a 4.XX air file, and that was the version released in MAW as the MkI, IIa, IIb and IIc, with and without Vokes filters. A IId was done at the time but was not released as it fell outside the period covered by MAW Chapter 1. It has been released since, as has a MkIV.
They are all based on the same model, and all the subsequent or 'ETO' ones are either straight repaints or mild modifications of the MAW originals.
That means that they are all of equal accuracy, and no one version can be singled out as being the more accurate. Obviously the Mk IId and Mk IV are not fighter versions, so your choice from among the others will be determined by the types available at that time in that area.