I'm looking at DFW-HND, which runs a 772 and 789 around the same time every day, and/or LAX-HND, which is 2X 789 per day. Regarding the J seats:

• Are they the same? Are the 789 ones newer, or both similar?
• They look the same, but are the 789's narrower, given they're both 1-2-1, and the plane is narrower?
• I'm guessing AA has completely gotten rid of those backwards/forwards alternating disasters that were on the 772 back in the day? Weren't those on the 789, too, or just the 788?

The other options are the JL metal flights, but that seems like a total gamble on what you're going to get. Might just do JL F on 773 from LAX, but the timings suck connecting to/from MEX.

Which would you choose?

Thanks!