Without really digging into dates of use (which I intend to at some point) I’d say they were used during fairly equal conditions.
I’m not making any claims on bedding them in properly but all were treated equally badly.
Superstar pads
Front
90.77miles (used beyond the pad material) Oct-Noc 08
86.84 (used beyond the pad material) Nov-Jan 08
117.03 (still in use but not looking very clever) Dec 08
49.04 (still in use) Jan 09
Rear
49.04 (still in use) Jan 09
86.84 (used beyond the pad material) Nov-Jan 08
483.53 apr-nov 08
Shimano XT pads
Front
421.16
809.96 (OEM LX) Jan-Dec 08
Rear
315.55
152.36 (still in use) Nov 08
291.10 (OEM LX) Jan-Dec 08
709.46 dead Mar 08
So yes the SS have been used mostly during winter when they have performed terribly for lngevity. During summer (which was very wet) the one set did very well for it’s cost.
But Shimano have outlasted them easily.