PS-Cups are hardly superior to RE070r's. Fractionally. That's a very very fast "road" tire that puts up very well with lots of heat.
In terms of M3 vs Boss Laguna we are talking about a car that dyno's 330-340whp with back seats and and a car that dyno's 405-420rwhp and has chassis support bars instead of back seats. I'm not even going into the torque numbers, it fell where it should've (impressive time at that) and they've never run an M3 ZCP at lightning lap