I rode them both back to back. As I said above I turned the 10 round pretty quickly due to a very hard seat and unforgiving suspension making the bike uncomfortable and a bit skittish. Engine was so-so in c mode, certainly not having the 'wanting to go' felling of my ivanised gen 1. Mode changes didn't make any noticeable difference but I have read since that the throttle needs to be closed before changes occur, despite the dash mode letter changing. Brakes and chassis felt good otherwise, but overall I was not impressed. If it's not comfortable (racing excepted) then what's the point?
The 9 was loads better. The bike was comfortable, handled well and had all the get-up-and-go that a claimed 115bhp should provide. It was smooth, felt well suspended and inspired confidence within minutes of setting off. The feel of the thing was very good indeed, quality even, despite being 'keenly' priced.
Was I prepared to hand over my mint and sorted gen 1 plus 6 large for it though? No chance. My gen 1 trumped it in every department. Nice try Yamaha (given the current Euro regulations) but not as good as a litre bike released 16 years ago.