I'm cross posting this since I don't know if this or ANA forum is best place.

I've booked (still have time to cancel) on UA a codeshare on ANA.

ORD to NRT (13 hours) is on a 777-300ER. ANA website says these are the newer 34" pitch seats, but I understand these are hard shell seats so I don't know about the comfort of these for a really long haul. Seatguru lists this as a 31" pitch seat. UA7938

NRT to BKK (7.25 hours) is on a 777-200. I think this is the old plane with the 31' pitch. UA797

Coming back the BKK to NRT (6 hours) is also on a 777-200. UAUA7968

NRT to LAX (10 hours) is also on the 777-300ER UA7946

I'm cheap. This is all K class.

Will these seats be torture? Should I instead look for a different combo of carriers? Flying out of MSP.

Thanks much.