I was able to A/B the ‘25 M Free 99 (prior hybrid core) and the SF100. Both in 184 and 185 length, which are actually 181.5 straight pull. Both weigh in at 2000g a ski. The tails are identical. Earlier front rocker rise on the M Free. There is metal under the M Free as will for the binding. I also noticed the M Free at its narrowest was 97mm. -5.5cm on SF100, -6.5cm on M Free.
The SF100 is slower to release and is better on edge imo. It’s still loose, but not as loose as the M Free. That’s not to say you can’t rail groomers on the M Free, you just have to be more aware. I found the tip and tail to be slightly stiffer on the SF100. For me that hindered its performance in tight bumpy terrain when in steeps. This ski is loud in icy conditions and not the most stable through chop I found.
The M Free is different to me in that it is more stable underfoot but softer in the tips and tails. It was better in chop and bumps due to those two things. I also found it more lively to hit every bump on the mountain. Confidence inspiring for cliff drops as well and just a more fun ski all around for me.
I was looking for a lower tide ski to compliment the SF110, which is stable underfoot with softer tips. I tend to like that style of sky, so for me this decision was easy and I’ll be selling the SF100. I’m not a fan of stiff from tip to tail lightweight skis, and I know 2000g isn’t light for most, but I kept getting that feeling with the SF100.