[Zeke]

It's quieter and should be more powerful in displacement, but I can't say that for sure because the direct drives really spin the pump and therefore should achieve a high rate of charge.
I just like an old 2 lunger that runs slower and lasts longer. The motor to pump ratio is like 3:1 or 4:1. The 2 lunger can be a dual piston single or 2 stage for higher pressures. I have never had a 2 stage. I look for cast irons pumps, too.