Actually the other two A345s are the BKK-HND route that started in October.

For the OP, I will echo other feedback that TG has the superior Premium Economy product. I'll be on the LAX-BKK on the 13th of Jan and I am quite looking forward to it.

One thing to keep in mind however if flying TG is that your CGK-BKK flight will be in regular economy. Still, I would go with TG.