Useful for banks buying vehicles. Also when i was stuck in Singapore during covid think yellow book and pink ID card was one of things helped me get on a repatriation flight back to Thailand
My wife has had no issues applying for it. First time was for business meeting so company paid for agent. No idea what different class means. Since then she has done on her own and she just said simple enough. I am not Australian so not sponsoring
Good water parks in both cities which good activity. Both actually have some good activities depending upon your likes/dislikes. Pattaya does offer snorkelling day trips.
Pattaya can be family friendly we just taken nieces there