LOL mmkay, Matt found some helpful info in deciphering the differences. Don't know why I didn't notice before that Rockauto shows some specs on at least the Raybestos replacements.
Regal/MC - Inside Diameter=5.43" Wire Diameter=.531" Free Height=15.56" Load height=10"
GP sedan - Inside Diameter=5.43" Wire Diameter=.541" Free Height=13.78" Load height=9"
GP coupe - Inside Diameter=5.43" Wire Diameter=.541" Free Height=13.31" Load height=9"
I'm presuming the difference in coupe vs. sedan GP spring heights is due to the 4-doors weighing more, but it's only a 1/2", so not a big deal. So it appears that even the Regal springs sit almost 2" higher than the GP springs, and the Intrigue springs (no stats for those) are the same as the '04 & up GP springs, which I'd think would be just as high, if not higher, as I recall reading that switching to springs designed for the '97 - '03 GPs leads to a drop in ride height on Gen 7 GPs. I'll have to think this over now. I don't want to deal with the issues of lowering a car, but I certainly don't want it jacked up another inch or two, either.