Thanks a lot for your input Dan!
Local North dealer lend me his 10m fuse for demoing this weekend. I hope there's enought wind for me since the season just started. I'll post how it goes if the wind comes!
I was just afraid of testing different sizes because last year the 12m and 13m rebels were two different machines! 13m seemed like 2 sizes bigger than 12m.
The Evo and the Fuse are very different kites.
The short answer is that I think you will be more happy with the performance of the Fuse. I wouldn't hesitate to demo the 10 as a test for the 12m... Though the 12 will obviously be a bit more powerful and a bit slower turning they are not dramatically different kites.
Coming off the Rebel the Fuse will be a little more natural of a change... They are a very similar shape.
The Fuse gets to the edge of the window and goes upwind really well whereas the Evo (as you noticed) tends to sit deeper in the window, which makes for a slightly more stable pull (especially when unhooked), but definitely inhibits upwindability.
They both jump really well, but the Fuse is probably a bit better for hooked-in sent jumps. The bottom end is probably pretty similar, though the Evo may feel a bit gruntier as it sits further back in the window while the Fuse will go upwind a bit better.
The Evo may be a bit quicker turning. The Fuse definitely has lighter bar pressure.
Hope this helps. As always, try to demo first. As I said, they are very different kites.