I noticed several buses on Sukhumvit that go from Sattahip to Bangkok, or Rayong to Bangkok. Are these faster to take than the Pattaya to Bangkok buses on Pattaya Nua?

I would think the cost would be the same, but not sure if the Pattaya to Bangkok bus is non-stop. I know the Sattahip and Rayong buses will stop periodically to pick up new passengers on Sukhumvit so it may take over 2 hours to get to Bangkok.

Pattaya - Bangkok -catching it on Sukhumvit means it is not an express, it goes the "long way" Sri Racha, Chonburi and stop to pick up pasengers along the way.