The Allsvenskan is the Swedish second division, after the SHL. Their Division 1 is the third tier and looking at the teams in that league i think we'd fair up pretty well.
Matzka went at a better scoring rate than Westerling whilst in the Allsvenskan, although he was some time before in fairness.
For a league player comparison, he has posted fairly similar numbers as Andreas Valdix and Markuss Nilsson, who were both petty good, but Westerling doesn't look to be an upgrade.
I'd be pretty underwhelmed if he'd signed for us.