Howdy the fire!
It seems to me that SK and Wolf are both manufactured by
www.lapua-gmbh.de in Germany. Go the URL and it sends you directly to an SK 22 ammo page.
Go here
http://www.wolfammo.com/index.php?option...&Itemid=14 and you'll see SK and Wolf advertised together.
SK and Wolf carry the same head stamp and Wolf is also manufactured in Germany.
Anyway - as for performance -
I've been shooting SK Rifle Match and Wolf Match Extra for two seasons over maybe 12 matches. As far as I'm concerned, both can out shoot me and I'm shooting high 20s and low 30s when in practice with my better half's Winchester (Miroku/USRAC ) 1885 with 24" bbl and Baldwin sights. I have not chroned them for a comparison, but am confidant that they will be pretty close if not virtually identical in performance.
Happy shootin'.