Sry for the late reply.

The C2 just seems a much more balanced boat, both upwind and downwind (long offset marks are a hoot too.) The groove upwind is much easier to lock into upwind. If your crew can work the main properly you can just keep working the boat up higher and higher and you improve the apparent wind angles. If you drop out of the zone it's a simple task of easing off and starting all over again. I think the Tiger and the C2 would be about the same speed and angle upwind with good sailors driving, it's just a wider groove on the C2 so the average sailor can maintain a higher speed and angle. (Gavin Colby jumped on my Tiger once and was adamant they're as fast upwind as any of the new designs....with him on the boat I believe it, not so much with me in control.)

Downwind the two boats are poles apart. The design of the front sections of the hulls mean that it's much harder to fully bury the nose (it's can still be done easily enough....) but you don't get any of the awful rocking you get with the tiger when the breeze was on. The boat can be driven very hard downwind and is very reactive to steering so you've got a lot of control.

Technically the layout of the C2 is much better than the stock Tiger, the wing mast on the C2 is better than the old Tiger mast, the foils are better on the C2, the rotator can be adjusted from the wire, the overall workmanship of the boat is very good.

We're a lot faster in the fleet with the C2 compared to the Tiger. I put this down to being able to maintain a higher average speed around the course rather than a higher top speed.

The only downside I've found is that if/when you do tip over it's an absolute nightmare getting back on. The hulls are very high out of the water...

Other than that they're a great boat. And if you've got a problem you can email Brett or Greg Goodall and they'll get straight back to you with advice, very nice guys.