There was an in depth comparison of the CZ Bobwhite 28 and 20 by a Canadian with the upshot being the 28 was a better balanced gun and very close to a British game gun in balance and handling characteristics. There were some issues mostly relating to finish and wood plainness according to the tastes of the reviewer. The site no longer exists, but I was able to dig it up in the wayback machine: https://web.archive.org/web/20120913042414/http://www.members.shaw.ca/sharptail/CZReview.pdf
The 20 ga. was considerably heavier and over 6 lbs. by almost half a pound whereas the 28 was 5 lbs., 6 oz. Mine is 5 lbs., 3 oz. It's too bad the Bobwhite isn't in production. My 28 had stiff triggers, but that was remedied. Gil
