As Peter has already pointed out,day tripping from Maratea to Naples would
take quite much time,so don't ever think of reaching Sorrento or the Amalfi
coast by public transportation.Even with a rented car,it would be tiring.
I've never been to Maratea but,for what I know,it would be a nice and
relaxing place to spend a honeymoon.
You cannot compare it to the other places you mentioned,though.I guess
there's a reason for people from every part of the world to come to the
Sorrento/Amalfi peninsula since the 18th century.If your main interest
is sightseeing you should try to stay very near the peninsula.