As mentioned you will be pulling in the edited versions and not the originals, if that's your intent, that's fine, but make sure you keep the Masters in Aperture available and not delete the app or the library so you can still go back to the originals.
Personally, I'd not go this route, but that's just me.
That makes sense. What actually shows up at C1 when you migrate over "automatically"? A hidden master with the edited ones visible? Or do you have to redo them all anyway? If that is the case, then is there a way to just transfer only the masters and plan on re-doing them?
I am not afraid of re-doing the masters because I think they would turn out better because C1's automatic sharpening, etc. is evidently terrific, C1 can do better with shadow and highlight recovery and perhaps those I converted to B&W could be done better in C1 the second time?