It's really pretty simple - if your 2014 RS already currently runs OEM 15" rims (it
should, and it certainly looks like it does!) then
ANY OTHER OEM 15" rim will fit.
I can't readily see where that link of the rims you want to fit comes from, but I'd suggest that
it's wrong if it's saying that or any other OEM 15" rim won't fit on your Spyder that's already running a 15" OEM rim - AFAIK,
ALL of the OEM 15" rims are fully interchangeable across the Spyder model range that came out with 15" rims - I've swapped quite a few rims for various owners, and for all Spyder models from 2013 & on,
I haven't found any OEM 15" rims yet that aren't fully interchangeable!!
If it was an a/mkt rim that's not necessarily the same spec, then sure, even if it's got the correct stud pattern, there
might be a
very slight possibility that it might not fit; but even then, if it's an a/mkt 15" rim that fitted onto
ANY model Spyder and it worked there, then it should fit onto
ANY OTHER model Spyder that runs the OEM 15" rims and work just as well on any of them - simples really.
Go on, DO IT!! You know you want to! 