If things haven't changed, I'd rather take the 763 in J:

- Take a D or G seat, so you and your seatmate have your own aisle access and won't disturb each other.
- Slightly better meal service.

Bulkheads are fine, though on the 763 I prefer to sit a row back, just to be away from the galley.

On the 772, I quite enjoy the privacy of 8JK, and the lavs aren't much of a problem, since they are on the other side.