Go read reviews online for both these skis. Also, go to Nestor's and talk to them (ask for Pete if he's there)....they deal with both Head and Fischer.
You don't need "narrower underfoot" than the Fischer, since it's 74, which is plenty narrow enough to carve very nicely, even on ice, and those few extra millimeters will help you when it gets cruddy, choppy, or when we actually have real snow! The Fischer Breeze is more of an "all mountain, all conditions" ski while the Head Cool One is for groomed slopes. You'll have to decide if you want a ski that's strictly a carver (the Cool One) or one that can carve, as well as handle some other conditions. I think it's going to come down to personal preference for you....don't let somebody just talk you into something.[\quote]
Quoted for truth! Vanhoskier is wise.
I'm not sure how much the difference in turning radius between the 2 (Head = 12.4, Fischer = 14) will affect your skiing.....somebody here who's an instructor can chime in on that.
The shorter turn radius on the Heads will make it twitchy and grabby if the snow gets cruddy. Many can ride something narrow and turny in crappy snow, but it takes skill and finesse to do it well.
On groomers, the difference in turn radius is negligible, and performance differences between the 2 will be more directly determined by their overall stiffness, stiffness distribution, taper angle, and tail shape.
Also, seriously, don't discount the twin tips! Today's twins are an incredibly varied and versatile bunch and many have carving skills to rival the non-race groomer zoomers. Plus the twins make them ski shorter than you'd think and they're fun enough that you'll find yourself wanting to jump and spin just because "you can". They truly are today's "all mountain" skis!!