RE: JRB vs. HPG
HPG "slightly comparable item ... Zippered edges, cinch cord for hitching it up around the waist, and full hood"
FWIW - in addition to being much lighter, the JRB has the advantage of being modular in that it can be fitted with a full hood and it can be fitted with arms, and it is easy to have a waist tie ... so, the JRB may be more comparable than what a first glance would indicate ... just saying ;-)
BPL review of the JRB Hood
Photo of the waist tie from the JRB website: