What is difference between ocean front and ocean view. All look the same.

Ocean front means the view from your room is facing the ocean. Ocean view means the view from your room is not facing the ocean, but you can still partially see it (e.g. your room is perpendicular to the ocean, but you can see it if you look off to the side).

Check the room categories in the middle column of https://advantagevacation.com/wp-content/uploads/2013/10/Marriott-Maui-Ocean-Club-View-Categories.jpg . The oceanfront units are the units closest to the ocean. Some are directly out front, so there is only the beach walk and beach between the unit and the ocean. Some are to the side, as part of a two-bedroom unit: the studio portion there may not have an ocean view at all, if it is in the Lanai Tower, facing south, though the north-facing studios there are great.

Ocean front is at the west end of the buildings, closest to and facing the water. Calling it "ocean" is a stretch since the view is the water between Maui and Lanai and, to the north, Molokai. To the south, you can see Molokini Crater. Depending on which tower you're in, Molokai Tower get a nice bunch of sun all day on the "Ocean View" and you actually face the pool but look across the landscape to the ocean. "Garden View" looks to the golf course and mountains rising to the east.

Talking specifically about Marriott Maui Ocean Club. All units appear to face ocean directly