two digital inputs. slightly better contrast ratio (may not see it), sealed optics. it's really a tossup. the in72 is a great projector, but chances are the cost benefit may not be there for you. the 4805 is a great projector too. if you were coming from any other 480p i'd say go for it, it would be a no brainer. i'd save your money and make a bigger jump. just my opinion though. however if your lamp is dead or near dead on the 4805 it wouldn't cost all that much more to just pick up an in72 these days.