Great table, very clear, I like.
You've put a number on the running costs. However, it is much harder (i.e. not possible) to put a number on factors like fun, desirability, satisfaction... I'm not even suggesting the GTI might be better than the GTD in these factors, it might be worse! Both are seriously awesome cars. I guess what I'm saying is to be careful when just looking at the numbers here. If we did that we'd all be driving BlueMotion polos or something!
The nerd in my is looking forward to tracking my running costs when I get my GTI and making some pretty graphs. Then we'll see how much it really costs!