First let me state that neither HH or Diana have skied either of these skis. With that said, I do think both these skis are worthy replacements to the old IM 78 which was the PMTS gold standard for a do everything all mountain ski.
I was able to ski both these skis over several days over this holiday season. First the Stockli. I continue to have trouble understanding their mount point on pretty much all their skis. I started with a mount 1 cm forward from their line. It skied OK but not great until I moved it to 2.5 cm forward where it skied beautifully. This ski unlike most Stocklis (at least from yesteryears) is not very stiff. It has a softer feel and it bends quite easily in carved arcs. The stated TR on the 175cm ski is 15.8m but it bends to a much tighter radius and it really rocks tight (call it 14ish m) arcs. Really fun. Having said that the lack of stiffness makes this the first Stocli that I have ever skied that does not have that glued to the snow feel. Edge hold is strong but not other worldly which we expect from Stockli. But off piste this ski is super nice and super friendly and real quick edge to edge. The time I spend on it with the mount 2.5cm forward it felt as fun as any 78 waisted ski I have been on and would do pretty everything I asked it to do. At times I wished for a little more glued to the snow feel but I probably would have gotten that at the expense of ease of use off piste. Its is substantially less stiff that the Kastle MX 78 and substantially more friendly off piste than that ski and in general more fun and just as much rebound as in tight arcs as this ski will pop you off the ground in arc after arc.
But then I started to ski the Blossom White Outs. As good as the Stockli is, the White Out pretty much dusts it in every way. This is the best 78 (its actually 77) waisted ski I have ever skied. This ski is only marginally stiffer than the Stockli yet it is totally glued to the snow with edge hold that is right there with every stockli or Kastle (mx series) that I have skied. Yet the flex is absolutely prefect for off piste skiing. The stated TR is 15 but it bends easily and nicely into more of a 14ish TR. This is one of the most fun skis to arc tight turns with. Felt a lot like my Head ISL with the snappiness of the short turns, the great rebound and how quick edge to edge they ski. Its a better on Piste ski than the old IM 78, better edge hold, easier to bend (although I am a better skier now than 7 years ago so some of it is me), tighter arcs and totally glued to the snow. Off piste this ski is fricking amazing. It went every where and did everything great. It has a pretty wide tip which floats amazing well and much better than the Stockli which has a reasonable amount of tip rocker to try and increase float. I felt like it had all the characteristics off piste that I get with me ISLs or TT80s (super quick, tight TR) but with a slightly wider a base which was just easier to ski off piste in mixed snow (mix of wind buff, crud, bumps and some left over pow). Not that I would ever own one ski, but I could easily only ski this ski 90% of the time which I did for the next several days (I own the 176cm length). I am totally in love with this ski and I ski it a good chunk of the time (do still love my ISLs as they are so much fun on good hard snow).
Next time i get Harald out to Montana I will get him on these. My guess is that I don't get them back the rest of the visit. He really liked my Kastle MX 78 and thought it was only slightly stiff but certainly suitable for him as on off piste ski. Harald has skied another Blossom ski that he absolutely hated as I understand its a much stiffer ski than the White Out and evidently the tune was also railed. You would not want a lot more stiffness in a ski made this way.
I think the White Outs are the nicest made skis I have veer been on. Hand made in Italy and you can feel it the minute you arc your first turn.
Both of these skis are worthy replacements to the Im 78 (at least in my opinion). White Outs definitely the better of the two.
We will have Max 501 on a pair fairly soon. Heluva has been skiing the White Out for several years (and he is the one that turned me onto these skis). I am sure that they will chime in with commentary at some point.
One last thing. The White Outs came with almost a spring structure on the base. It would have grabbed our grippy snow and not let go. I got a new base grind and put on a mild winter structure and they skied great.