They're 440B and hand forged. No idea how they compare as I don't own one each of the same model.
FWIW, Randall's literature just states the O1 version holds an edge 10% better and is easier to re-sharpen but is less stain resistant.
They used to use 440B but switched to 440C about ten years ago. Still forged. I have one on order for this November but looks like it will be pushed back till Jan 09.