Thanks
Like I said, I want to compare both methods using same pump.
1. I did run a Sedra 5000 (39w) and Aquabee 2000 (18w) together in bucket and they take even longer to make foam, so I know Mag 12 is doing pretty job, but with right nw it could be better.
2 Even though Beckket air opening is 1/8" needle valve while NW's is much larger (see pic), NW draws lot of air but there is no way to make it suck more than beckett (unless airpump is involved).
3, Yes, there is venturi just like any nw pump.
4. No doubt, Beckett pushes higher volume, flow of NW depends the air volume.
5. I would say NW, it's hard to see.
As you can see, for same pump beckett produces much faster foam and uses just little more power than NW (66w vs 53w).