I’ll be honest I demo’d 650 and did notice a slight difference. Bike carried the speed more, without getting too cliched about it. But, I’m also aware that could be as it was a lighter bike, new forks, newer design, went like a bullet.
Anyhow, I ordered one.
I was in the bracket of waiting till next year to see what happens, but then my old bike was needing a serious amount of cash thrown at it and really didn’t see much point wasting money in a 4 year old frame. Took the gamble with 650. Bike is awesome, so I’m happy. Well, will be once it arrives…