They look similar to Antera 181 wheels as fitted to the de Tomasa / Qvale Mangusta from around year 2000. After seeing them in an Autocar article I kept looking on eBay for quite a while trying to get a set to fit to the Coupe, thinking the same, that they look similar to the original 20vt wheels.
1996 Portofino 20vt & 2000 Pearl White Plus 1985½ & 2016 2017 Fiat 124 Spider + XF Sportbrake
I don't know if there really is engineering substance to this but I remember reading once that having the same number of spokes as nuts/studs for holding the wheel on can make for more strength. There is some logic to that in terms of alignment of forces but having had a spoke on a standard wheel break recently maybe not worth worrying about.