PHX - TPE on family emergency 2/16

I am booking last minute ticket to make a family emergency on the day of 2/16, so my flexibility is very limited. The best option I could find are $754 or 44,000 miles on Delta Basic Economy (PHX-SEA-TPE) redemption.

United (PHX-SFO-TPE) offers the same cash price if I want to pay $.

Does economy seat matter much between Delta and United?

Are there any other programs I should check?