All on 14's but I believe Phil's (green) Spyder is on 5.5" wide while mine is on 4.5" wide while all are on 175's. Not sure about wheel width on Barry's blue one. The main differences on that pic are the tyre aspect ratios, 70's on mine and 80's on the other two, and suspension settings, mine was lowered much more than either of the others at the time.
I'm usually a fan of Autobahn Scraping suspension but it was this picture that prompted me make the change to higher profile tyres and less slammed springs as I felt the other two cars just looked better than mine at that ride height.
Here's another shot from a different angle which also captures the difference -
