Thanks for all the replies so far.
The reason I ask is because in searching for wheels I've seen "stiffness" claims based on spoke count, rim height, rim material, hub flange height etc etc. And I took "stiffness" to describe a specific ride quality akin to harshness. Maybe the ad copy refers to lateral stiffness and not so much vertical compliance....or maybe it's just marketing hype!
I've had 2 sets of Fulcrum 5's on my Lynskey. The rear wheel from the factory original wheelset from Lynskey lasted 28,000 miles and I replaced them with my current Fulcrum 5 wheelset with 31,000 miles.
I was/am looking to see if there might be something "better"....and just to get something different. I've looked at everything from Hunt, to Pacinti, to Blackset and everything in between. I could spent a couple of hundred dollars more and drop a couple of hundred grams - which I might or might not notice......But I agree.....these wheels have served me well.....why change from a good thing?