I went from a cbf500(same engine i believe as a cb) to a cbr 600 a couple of months ago.
Like yourself,i found the ride much smoother,and better for it.I much prefer the faring over naked too.
The cbr is noticabley faster however,not as much faster as I first thought it would be.Just like you found with the gsx650 really.
I think this is because the cb/cbf is looked upon as being really,really slow when it just isnt.So you expect more than you get with the trade up in bikes.
Also,the inline four is so very different than the inline twin to ride that it can take some time to adjust.You have lost all that low rev grunt/torque and gained high rev power.
Futhermore,no disrespect intended as please appriciate i dont know you but, perhaps,as eatcs01 has hinted at,you need to ride it a bit harder to really find that extra power.
I used to wide open throttle in 2nd on the cbf quite comfertably but as yet have not done so with the cbr as im too much of a wuss.
For me personally tho,I much prefere the inline four.My cbf would get bad vibes at 65mph and now at 65mph the fun has barely begun.