Ok so here are some pics I took this evening of the Renaissance Transkit compared to Tamiya parts and some of the result on the 2003 livery.
I still have to upload some pics of the real car but all the pics are in
this gallery.
The first strange thing is that on the box art Tamiya shows the right rear wing
Dashboard:
Rear wing
Result on the built model
I hope this already helps you to see the differences...
I'll upload in my gallery and post here some pics of the real car as soon as I find the most interesting.