If you want to go to Bangkok from Pattaya by bus, there are basically two options. The first one is normal size bus operated by Roong Reuang Coach, the second one is mini van called “Rot Tu”.
The Roong Reuang Coach bus is safer and cheaper, even though the terminal place is not combinient than other mini van service. So we recommend this as the first choice.
On the other hand, several mini van service are operated by small operators at several small terminal.
The van is for 10 passenngers, and smaller than normal bus, so if you want to bring big size luggage, you had better ask the staff before buying ticket.