I think the comments on having weight in the right position on a rigid to protect hands are bang on. Jeff Jones and stooge have the same angles but I think the main difference is that the Jones has longer chain stays and a shorter reach, this helps that more centralised, upright position which probably helps with steep climbs and makes it more stable on descents, though maybe less agile.
You can almost gain this position on the stooge having a shorter stem and rotating the EBB to the front ime.