According to the Essential Depot website, “A high level of unsaponifiables (portions of the oil that don't react with the lye to form soap) in Pomace gives a faster trace.“
Pomace is higher in acidity than other OOs -- that's why it's recommended for soaping vs EVOO which is lowest in acidity, tastes better and is therefore best for consumption.
I use pomace for faster trace. But my local grocer doesn't carry it anymore, so I probably won't be using it much anymore unless I choose to order it from Soaper's Choice. But I do like it for Castile soap and when I start to run out of Castile soaps, I'll probably order more.