Concerto: a bit more ''Romantic'' sounding, very smooth but not as dynamic as the Home.
Home: More definition, high frequencies may sound a tad bright sometimes, very nice low-end extension for its size.
Not sure about this last one: I think the Home is shielded where the Concerto is not.
I owned both, the Home sounded great with tubes, less with solid state, where the Concerto sounded nice, but with less resolutiion, with both tubes and SS. Needs some power to make them come alive though, I would say 100 watts minimum.
good luck,
Mike
