not sure about the zoom, but I own an sr-16 which I've used for bongo and soft drum pattern backgrounds while playing live drums over top (like a couple of famous songs from the 80s, such as In the Air Tonight by Phil Collins). It is very convincing and nice sounding like that. I recall liking it's real drum sounds but have only used it professionally in the soft rhythm track style like that, so can't vouch for it as a real replacement for a drummer.
Cool unit though. recording is easy on it as it's rather like recording on an akai mpc or similar with loop pattern recording. Probably all drum machines are like that, I don't know, but I do like this one for sure.
I've only ever heard zoom drums in my zoom g1x type pedals.... good enough but certainly heavy hitting and unmusical, but that is likely a side effect of what they're there for in the first place (rocking out while practicing). So I can't say about the zoom drum machine you're talking about, and will assume for the moment that the samples aren't the same as the over the top midi velocity 127 type drum loops in the guitar pedals.