I have made more Castile soap than 100% Coconut oil soap, so I am not one to be able to say for sure how they compare to speed of trace. Also the temperatures are different for both. But I can make Castile with 50% pomace OO and 50% plain OO, never use a SB, only hand mix and have it trace and poured into the mold in a matter of less than 10 minutes. I have to work fast if I want to do any kind of swirl with this combination.Faster than coconut oil?
I won't be doing a test on it, but if I were to do so, I'd set it up so I'd be using the same temperature and 100% of each oil (not my 50/50 mix of pomace/regular OO) and then do a time comparison that way. My guess is it would be close, but as I said, I probably won't be doing this. I don't have much use for 100% CO soap.