As a general rule, you shouldn't compare one player's production to another player's production with the implication that the two are necessarily linked and will track each other over time and across different competitive environments.
Dahlen's production in the Allsvenskan over the last two years compares, in the aggregate, to players who were 35-40 point players in the NHL at age 25-27. That doesn't mean Dahlen will hit those totals - it simply means he has been producing like a group of players who, when averaged, wound up producing at that rate in the NHL. Some of them never made it, and others turned into top-six forwards. We're pretty sure Dahlen has the talent to be the latter, but there are serious question marks as to whether he has the mental fortitude to do so.
Honestly, if Dahlen turns into a Sorensen - a bit of a tweener who turns in one good top-nine season - it's a success.
Given that Gambrell's ceiling is basically now - a 4C on a good team - I'd rather protect the guy who at least has upside. Balcers may have passed both, though.