I've almost bought a P-09 a few times, but have held off hoping to find a Phantom. I think the grip my fit me better, but have never met one in person.
From photos, it looks like the frame is a little wider than my SP-01.
Actually the Phantom frame is a smidge narrower. (WRONG! The Phantom "slide" is a smidge narrower)
The Phantom easily fits in an SP01 holster, (WRONG! It "can" fit the SP01 holster. Pretty snug, but fits in mine anyways)
the SP01 is pretty tight in my Phantom holster. A big part of this is the slide profile, the Phantom is cut a little different, making it seem smaller.
I can try to get measurements and pics tonite if you want.
Edited to chastise myself and add correct info.