Very simple: The HR-10 had a smooth painted cabinet and the HR-10B has a wrinkle finish cabinet. Otherwise, exactly the same. The paint was changed to match the DX-60B. Glen, K9STH Website: http://k9sth.com --- On Sun, 9/6/09, Doug McDuff <w4ox at bellsouth.net> wrote: Can anyone advise, in a nutshell, what the differences were between a HR-10 and the HR-10B?