What are you looking at price difference wise? I recall that the air power factory rebuild is somewhere in the 60s. I also believe that comes with a rebuilt turbo as well? If I still own my plane when I get near overhaul I’ll probably go rebuild. From the little that I’ve heard they seem to perform very well.
It’s over $100K for a brand new one but the last person who got the factory rebuild said almost every part was brand new.
The factory zero time is about $68K (with core) and non-factory rebuilt estimates I have thus far are $38 to $47K. I am unsure about the turbo as part of the factory zero time. I will look into that.