313 HR engine is 80% new/uprated parts compared to 260hp DE engine and can be modified to scary HP figures on standard internals, it's a solid engine. Basically two different beasts. Kintores car has obviously been given a good clean up to sell whereas the kemnay motor has been left as was which in my opinion shows a more honest car. As long as the servicing has been maintained I'd go for the 313 silver one everytime. Alloys easy to replace. centrecaps I'm sure will be an easy/cheap part to get from one of the forum traders, maybe zmanalex. You could make a few bob off the induction system by the sounds of it too. Only thing to remember with the silver 313HR engine is that road tax is £400+ a year. Good luck on your decision