'07 fast lap in practice was Spies with a 1:49.407
Checa's superpole time was 1:48.883
Fast lap from the races in '07 superbike was Mladin with a 1:49.830
and in WSBK '08 it's Checa with a 1:49.703
both those times where set in race 2, if you compare race 1 then the AMA guys where faster last year than WSBK was this year.
so figure it's about .1-.2 difference between AMA last year and WSBK this year.
now to compare AMA last year to this year, Barber this year Spies turned a 1:24.609 in practice, and last year it was 1:24.735, so figure they're about a tenth of a second a lap on a shorter course faster, god only knows how that compares to miller tho, it's all just an educated guess.
just looking at the numbers tho it looks to me like they're within 0.1, which would put the Yosh boys on the front row if they could make it thru superpole in 1 piece.
But I wanna be the first one to say this isn't even close to a level comparison, WSBK guys get Q's in qualifying, they've got a spec tire in the race (AMA doesn't) they'll be on different fuels, the Alstare Suzuki's are up almost 10mph on the yosh bikes, which says to me that they've either got more gear, better aero, or more power, god knows what.
Here's where all the info can be found.