From my experience it is something like 3:1. Where 30mg of AP238 is like 10mg of morphine.
From my experience 2-methyl-ap237 is quite abit superior and is perhaps 2.5:1 and is more euphoric than AP238. Neither are anywhere near as euphoric as morphine though. That number is just analgesic potency not euphorogenic potency. 2-methyl-ap237 had its moments but AP238 just sort of sucked. O-DSMT is better than both due to its long duration but also kind of sucks. At its peak euphoric effect 2-methyl-ap237 might be best but its a fleeting feeling and requires frequent redosing. Anyone who says either are equianalgesic to morphine is inexperienced.