Ohlins is better. I bought a standard 1098 & then changed the shock to the ohlins off the S model. Made a world of difference on my 1098. Also bought a Ohlins shock for my 2000 R1 also a significant upgrade, the shock was more compliant with tons more feed back than the stock shock. Both the 1098 & R1 were use on the street & the track, the Ohlins components were worth every penny. Ohlins is just a more finely tuned component. You can retune stock suspension but then you really need a master at shim stacks which is an art form in its self. I just bought an RSV-R on the brink of death, Bent forks, both rims, triple clamps & both axles all bent. All those components are straight now but I still have to take the time to have the frame & swing-arm checked. I got the Stock RSV-R Ohlins forks back from straightening & a rebuild, & even off the bike just pushing down on the fork by hand you can feel the finely tuned shim stacks smoothness. Just my 1.5 cents.
Also I read on this forum that a local dealership in Glendale California U.S. called Pro Talia was no longer servicing or sell parts for Aprilia. This is completely untrue, I called them today & verified they will service any Aprilia, as well as get parts for the bikes.