As the BK-9 gives you a separate bank of eight 'Favorite Tones' for UPR1 UPR2 LWR and MBASS. On the whole, I don't need to mess with the OTS just to have my favorites ready to go. I can use them for more specific things, for instance changing from Split to Full, or LH bass, etc..

Seems a PITA to have to duplicate all that work for every style you use, just to get easy access to your eight favorite sounds...