Well,
we have all three styles
Our main one in the S&B kitchen has been a side by side for YEARS, decades - we really don't know anything else, except:
our utility room has the old two door beer fridge, freezer on the top and all...
but it's used a LOT so we can bulk store there to leave the kitchen fridge 'workable'...
THEN there's the bottom freezer residential in the rv... actually not used it enough to have a like or dislike about it... the only thing I will say is it is sure nice not to have to worry about things thawing out or getting hot like our dometic did!