Differences between S1 and S2 bodyshells

Hi guys, I have a late 79/early80 GTI for restoration.
It needs work, lots of it but I am happy to do it.
The car was pulled out of a farmers yard after years of sitting there as a spares car to his other mk1.
Its just a shell but areas like the front panel need work.
Now I searched the site to see if there was a definitive list of differences.

What i know:
S1 has different front wings
S1 has different dash mounts
S1 has Different rear panel
Early S1 has different door hinges
S1 has different Tailgate (number of internal holes)

What have i missed?
Thanks