The Vee has a lot more punch and top end power, but uses more fuel (typically 40 to 45mpg), wears out rear tyres more quickly if you use the power, my be more lumpy at low engine speeds round town (mine isn't a problem though) and should be a bit cheaper to service as the valve clearances are easier to do. The best solution is to find a dealer with a good used one and go for a decent test ride. The one you have a link to looks OK and the price is probably about right for a dealer. It looks like the GT model which came with full luggage, centre stand, heated grips and hand guards all fitted as standard.