I am in doubt for my domestic flight from Bangkok to Chiang Mai.

Nok Air & Bangkok Airways are pretty much same price - Bangkok Airways is a better airline, but flying from BKK - while Nok flies from DMK. I'm staying near Ploenchit BTS (Novotel) - so could either take BTS/Train to airport or Taxi. In the same holiday I already have some Bangkok Airways flights booked, so I am quite curious to try Nok Air.

If price is the same - would you prefer Bangkok Airways via BKK or Nok Air via DMK?