Well, speaking from an owner who has both, I appreciate them for different reasons. My 1098S is full-on track machine (lots of 1098RS parts imported from Europe). Spent $30K to make the suspension and most parts WSBK. It's the best handling bike I've ever ridden (old racer) but trust me it has its idiosyncrasies, but it's just fabulous on the track. The wrist breaking handlebar position, the heat from the under tail exhaust, the clunky gearbox all just disappear when ringing it out on the track. I just picked up a 2002 RC51 with 25,500 on the clock. Really good shape mechanically, but needs some minor TLC in the cosmetic dept. Picked up it Saturday and have wanted one since I first saw it at the LA Bike show back in 2000. Rode one once from the Pacific Ocean to Alice's restaurant back in 2001 or 2002 and that ride stuck with me all these years. Not as fast or sharp as the 1098, but still had a big grin on my face on the way home. Similar sound to the 1098S, but uniquely different. It's a great street bike V-twin option to the 1098S as it's a lot more comfortable. This may sound bad, but the fact that it's a Honda and dead solid dependable is actually felt in the way it rides, shifts, sounds, etc. I've been looking and parts are getting hard to find, but still very reasonable. Ducati parts are ridiculous, but they are Italian and there's just something about them. (I sourced a factory RS race swingarm for the 1098 and stole it at $3800?) As compared to $4200 for the whole RC with spares! So two similar bikes, but I'm enjoying the sewing machine perfection that is the RC and it's cam driven drive train, and know that it will be in my stable for many years to come.