Lufthansa Business Class: 747-8 or a380?

Have the following flight options on business class:

MUC-BOS (J) on a380 connection to MIA (60k points) or FRA-MIA (J) on 747-8 (70k points)

Which would you choose and why? I probably won’t have many opportunities to fly J again within the next couple years. Very torn.

Edit: Decided to go with the 747 upper deck! Row 85. Thanks everyone for the input, super helpful.