Taildragger,
Well we have run the 22x8 as a break-in prop on the DA50 with about 6-8 gallons through it. We thought that may have been enough, but possibly not. With the 23x8 we were hoping to get a better pull-out from a hover and through some various other maneuvers. Another reason we went with a 23x8 is that DA recommends it after break-in. This may not of been the right thought process but it is what we felt was the right direction to go.

Eli