I've got both.
The Skirmish is a lot of knife, for a little money. I had heard there was some controversy relating to its design.
So I showed it to my wife. "Is that a new Spydie?". Hmm.
It's still a lot of knife for the money. A colleague of mine describes it as a practical knife for orc hunting. It looks *very* sheeple scary.
The Sebbie, despite being a lefty (all I could get pre-loved) is a much more carried knife. Looks like a knife; sharpens beautifully, doesn't scare the horses.
Out of the pair of them, I prefer my Manix. OK, the Sebbie.
But buy both. Me? I'm biding my time for my next knife. Which will be a Strider. Or a Lochsa. Or a Poliwog. Or a Gene Ingram fixed blade. Or another Gransfors Bruks axe [got to love an axe so sharp it slices through the sheath to bite your finger, just 'cos you haven't used it in a while]