When are you going?
I'm actually staying at both resorts for my honeymoon in June. We're staying at the Marriott Maui Ocean Club through II and then going to the Hyatt (they're right next door from each other) to finish off our 10 days stay.
We're staying at the Marriott Maui Ocean Club in an OceanFront 1 Bed Villa and then Hyatt in a OceanView King.
I can report back on both when return, but it may be cutting it close.
Congrats and Good Luck!