We're trying to decide between the Buderus G115SW/3 and the Biasi B-10/4.
They appear to be basically the same technology and nearly identical AFUE efficiency ratings. The net outputs are a little different, but both should be fine for our home. The differences we see are: Biasi is a bit lighter and has a lower water capacity by 4 gallons. It also seems to have a better warranty, though I can't find specifics on that... only heard it described as non-prorated limited lifetime, and maybe even transferable to new owners. The Buderus is heavier, has a higher water content, looks sexier , and has a limited, prorated, non-transferable warranty. It is also about $ more.
Which would you choose? We like the Buderus because it has such good name recognition and looks cool... but that's not worth$ unless it really is a better boiler. Is it??? (Maybe it is a selling point when we sell the house in 4 years?)
FWIW either one will be installed with an outdoor reset, indirect HWH, in a forced hot water baseboard system in Maine.