Bus from airport to Pattaya
Yes there are 2 companies - they both leave from the public transportation terminal (lower level "ordinary route" bus - takes a few minutes longer - gets there the just same as the "express route" on the second (I think) level but "detours" thru the duty / tax free zone. - FREE ride to the terminal)
Anyway - the 2 bus companies serve slightly different routes - one is the "blue/white" (same as the bus from Ekkamai or Morchhit and delivers you to the North road bus station. The other is a "better" bus (actually) that runs down Suk (stops at North, Central, South, Jomtien Lotus and then on down to almost to BEACH ROAD JOMTIEN (about 50m to the road from "the end of the line") Ticket office - stand at the "Pattaya" bus sign and face toward the seats - it's just to the right of where the security guys sit. 106B I've done both companies - the Jomtien buses seem cleaner route almost identical but better IF you are going to South Pattaya because of the extra distance covered down Suk. Jomtien bus is the first out at 645AM - right at a 2 hour run.
IF you are going to Jomtien, take the Jomtien bus (easier ride, then get a songtaew on Jomtien beach road - right about Soi 30 IIRC - lower soi numbers as you go back toward Pattaya - to the "right" as you approach the road from the bus station) otherwise, you will need to cross Suk to get to Pattaya N, S, or Central and get a songtaew into town from there (still 10B right now, Thai price always has been 5B but they are expecting for that to go up for Thai as well BTW)