I'm not familiar with your model, but I just upgraded from a venturi skimmer to a needle wheel skimmer. What I perceive to be the difference is that the impeller on a needlewheel uses extensions from the impeller to "chop up" the air as it's drawn in. It might pull in a little more air as well because of the design. In theory the needle wheel produces more fine bubbles. The skimmer body is pretty simialr between the two. In both of my skimmers, the air came in through an airline. The needle wheel pulls the air in before the impeller, and the venturi pulls the air in after the impeller. In either case, the air is in the water prior to going into the skimmer body.
By the way, mine is a HOB
Coralife Super Skimmer 65 and my old skimmer was an in-sump from Sealife Systems. I don't think Sealife Systems makes the design any longer.