Righto! I rode this bike at the Anglesey meet this weekend as my plan due to the unpredicatable weather was to have a wet and a dry bike, unfortunately Sunday (day 2) was so wet and windy the races were abandoned.

The selection of the '21 as the dry bike was purely as it has some Diablo Supercorsa's on (in now apparently unobtainable 110 and 150 sizes) that deserve more than just being squared off on the road.

Inital observation is the '21 (even with stock R forks as the resprung/revalved ones it came with have a leak) will tie the '18 in knots if the place is twisty enough. The '18 feels somewhat quicker, maybe just as it's lighter and has fresh rings but the '21 just turns so well.
I've never felt so confident with the bike over on its side in my life, even on my '28 c/w £500+ worth of K-Tech suspension set up for me.

Maybe it's the tyres...maybe not....
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