The Hybrid is a much lighter call in my experience. I've probably put air through a dozen or so screwing around Spencer's table at a show. The 45 is lighter than an original and I'd place the Hybrid as lighter than the 45, but certainly heavier than the Easy Bark. I can break all of the cuts over except for some of the heavier tuned Originals. I've come across an Original or two that I just could not get up, but my brother could.
Volume is a function of caller ability, assuming a decently tuned call. There are calls that are easier to get lower, but I've watched more able callers than myself take heavily tuned BSODs and do with them whatever they wanted to up, from taking them down to a whisper to dern near ringing them.
2014 Season Totals:
Blue Geese: 134
Snow Geese: 178