Randomish Question.

Flying out of SEA, I have booked both one ways to/from TYO via J in May.

I'm going to change one segment to F if available near time of flight as I have the points required, but I'm looking on opinions to fly to Tokyo in F vs flying back to SEA in F.

I know the lounge in HND for F is amazing, but I'll have OW Emerald which I think will get me into JAL 1st Class Lounge.

The only real difference I feel flying out of HND vs LAX/SFO F is Salon Champagne is offered via HND departures, other than that I think I would feel I would enjoy the experience more flying to Tokyo in F vs flying back as I'll be burnt out from a 3 week trip, I think I'll sleep most of the flight back.

Any opinions appreciated!