Some more comparisons:
SoW:BoB - WIP 2010-10
Battle of Britain II v 2.11
IL2
Wings of Prey
I vote for SoW:BoB even though it will surely get a better palette/shading etc. The important thing for me is that it's the only where the Hurricane can be mistaken for a real image, the other ones are not even close - and this is about aircraft - isn't it?
I hope image no 3 is ok here - it stands out as the least convincing to me so...