Is there a difference between the...

Is there a difference between the Lahaina and Napili towers?

They are just different towers. Marriott's Maui Ocean Club has Lahaina & Napili Towers. Owners and guests are able to use the amenities at both locations

Villas in both towers are furnished and decorated exactly the same. Lahaina tower: the southernmost Marriott resort building, has an actual lobby. Oceanfront view is of Lahaina town, the islands Lanai and Kaho'olawe. Napili tower: the northernmost resort building -- closest to Whaler's Village, one of largest open, green lawns along the main Kaanapali Beach, has its own bar. Oceanfront view includes islands Lanai and Molokai. Both towers face a wide, sandy beach and a relatively shallow, warm ocean channel that serves as a nursery for baby whales (calves) and a playground for pods of spinner and bottlenose dolphins. Both towers have quieter, meandering pools with hot tubs, waterfalls and towel hut. All guests have access to the centrally-located 3.5 acre Super Pool with grottos, waterfalls, slides, sand-bottom Pirate ship cove, bar, Iive music, pool food & beverage service, Starbucks, carry-out food, & full-service restaurant.

A little yes. An Island view in the Napili tower does look at the mountainside and island itself. The 3 bedroom unit in the Napili tower seems to be a little on the smaller side.

Parking is more convenient in the Lahaina building as the bigger lot is adjacent to that unit. It is a decent walk to park in the Lahaina lot once the small Napili lot fills up early evening.

Comparing the 3 bedroom units in the two building, the Napili building has a larger lanai and a wider expanse of windows that provides the best view of any of the units.

Actually yes. The Napili tower is on the west side of the main building (where check-in is, etc.) and is closer to Whaler's Village. There is a pool and jacuzzi there, as well as BBQ's and the beach hut for activities - surfing, snorkeling.... - is located here too. There is also a small bar at this pool. Also, this is where the large grassy area is.

The downside to the Napili tower is poor parking.

The Lahaina tower is on the east side of the main building (closer to the Hyatt Hotel). They also have a pool and jacuzzi, and BBQ's outside the tower. It also has a grassy area, but the Cabana style loungers that you can rent tend to be more in front of this tower. You have to go to the main pool area for any drinks or food.

This is the tower closest to the kids playground equipment, tennis court, and large parking structure.

If you get a 3 bedroom unit, the ones in the Lahaina tower are a bit larger in my opinion.