If you were keeping the car ide say mk2 anyday. but as youve said your going to sell it on streight away i could see a tiny bit more profit in the mk4.
But know you would easy sell the mk2 where as the mk4 would be a pain in the ass.
hmm tough one really, ive seen a few mk4s with small engines and autos sell in less than a week, but ive also seen some that have taken a long time, luck of the draw really