JAL 100%. Better mileage program, more perks. ANA is simpler to get lower status, but getting to the top is better on JAL. I can speak highly for the quality of service at JAL. Now to be fair, I have had Diamond for 7 years, so on my normal schedules and airports the staff recognize me. I have not been able to fly at all this year. They have frozen expire dates for status, allowing for an extra year to make up for the lost 2020 year.

The JAL flight JL01 from SFO used to leave near midnight. I screwed up once and booked the flight on the wrong day. When I showed up a day late, they asked if I was okay as I had been booked on the flight the day before. We had a good chuckle at my screwup as they found me a seat on the flight, handing me a ticket, no change fee, etc. without a thought.