FRAM certainly IS NOT top notch. It's a (almost) universally hated and despised filter. Their filter material leaves less than is desired; for a proper functioning filter.
WIX has been used/sold by AMSOIL which is a good enough endorsement for me. If you go to the end of the article and select the Opinions & Recommendations link, you'll see that the author pretty much agrees with Will's opinion on the Fram brand, i.e.,
Prolly doesn't make a heck of alot of difference R&R, especially if you change oil more frequently than recommended in the manual. Myself, I change my 100% synthetic oil every 5-6,000 miles.
I have used the Wix filter in several. Right now I have a NAPA PS1358 flter iun the R3. Both brands a really good. I rode Moto Guzzi for awhile . They have a enclosed system around their flters. To many stories about split fram sides and toasted engines. BMW riders will stay away fromthem also .