THCP is more potent than THC-O. THCP is twice as strong as THC-O and approximately 10 times as potent as delta-9 (THC). In contrast, THC-O is approximately two to three times more potent than THC. Yes, there's some pretty volatile chemistry involved.
It's reasonable to assume that THC delta 10 is at least slightly stronger than THC delta 9 simply based on the observed relationship between delta 8 and delta 9.