Teamdarb: The difference is probably pretty negligible. SMP look much wider (for the given size) than Gatorskins, though I've never measured them.

Fietsbob: Yes, I otherwise use same f/b too.

32mm rear with fenders is as wide as my bike can take. Front, I don't know. Would be interesting to see if one of my 35mm studded tires would fit the fork. Thanks for the idea!