I'm going to take this in two parts- the grind, and the blade 'style'.
I'm starting off assuming that by scandinavian knife you mean something we'd recognize as a puukko, not a 7 inch leuku
GENERALLY speaking, you'll find that the puukko has a better point for drilling, a narroer blade with a good woodcarving geometry, and a fairly narrow belly taper.
MOST nessmuks will have a bigger belly, more blunt angle at the point, the famous hump, and be ground more for slicing draw cuts like you'd expect with a belly like that.
(still disregarding the grind for the moment) I find that a nessmuk is much more of a hunting style utility, food prep, and -- well-- hunting knife. A small one like the necker and pocket sized would make an excellent tool for low impact hiking, small game processing, and cleaning large game for packing out to the butcher. The mid sized ones, Fiddleback's are the WSS gold standard for these, are going to be -IMO- a long step up from carrying a regular American pattern clip point hunter or drop point hunter.
On the larger side, and not in the same class, are some of the bigger drop edge, wide blade nessmuks. These are very very good camp knives, and excellent wilderness knives especially if paired with a small puukko or woodslore/bushcraft style necker or pocket fixed blade. Koster makes some very good ones in this area. I *don't* consider them 'nessmuks' in the traditional sense, but I think that they are excellent as medium/large field knives. I'd take one along to help quarter out game, split firewood, or do whatever I want when woodsbumming.
The puukko style is going to be closer to (and forms the basis of) a woodcraft or woodslore style bushcrafter. While my martini puukko serves fine as a fish or small bird knife, it's mostly a utility knife for people who deal with wood

I'd far rather carve a figure 4 with this than a nessie most of the time.
the scandi grind itself (now we're talking grinds) makes for a very strong woodworking edge, wicked sharp and conceptually easy to sharpen. There's nothign wrong with it on a nessie or a puukko. You'll also find a lot of flat grind with final bevel in a V, compound V, or convex on a lot of nessmuks. No problem there, just htink of it a a green river with a specialized tip. Nessmuks (especially ssmaller ones) are also a place you are likely to find full convex grinds. I think there's nothin better, but that's me!