Did we not answer that part? Silly us.

Turns out we did answer the question exhaustively, and the answer is "either."

The salient point is that bananas will keep longer the more processing they receive. In the peel, they will keep for 2 months. In chunks out of the peel, they will keep for 3 to 4 months. Pureed and acidified to prevent browning, they will keep for 4 months.

In no event should they be allowed to get lost – unmarked – in the depths of your freezer. Keep track of them and use them, you'll be happy; lose them, and you'll simply throw them away later instead of now.