5th gen Si vs VTiR

[Manabir]

also comes with auto climate control and sunroof, carbon fibre interior bits, although that can easily be amended by diy.

how are the digital climate control and the sunroof "easily amended by diy"?
it isnt easy to hook up all the sensors for the climate control and is cutting a hole in the roof really a diy?

get a vtir....much nicer car.
more extras, as explained above, a nice amount of extra power and 5 stud wheels (better selection of aftermarkets)