I like the PI, but have often wondered about the Imori. A little bigger, and a bit grippier. 2.4 percent elongation at 10 percent mbs. I couldn't find a spec on PI, whereas bluemoon is 1.4 percent. I think PI might be similar.
I am planning to buy a screamer for the basal anchor for my HTP. I've been not using it the last couple weeks, as I realized I should probably put a shock absorber in for safety with all the remote sets, and for cinching up at the trunk, I would have very, very little rope in the system. If I"m trunk cinching right at my waist on a conifer removal, I don't need the low stretch nature of the HTP.