I make about a hundred withdrawals per month using cardless withdrawal, so the number of ATMs available for this is the most important feature of a bank for me. That Bangkok Bank and Kasikorn Bank account holders can now both use the same ATMs for this effectively doubles the number ATMs for each bank. So it’s between those two.
I have an account with Bangkok Bank and I am satisfied with them, except for the inability to pay provincial electricity authority (PEA) bills from the app. I haven’t had a KBANK account for many years, but they seem very popular and can pay PEA bills.
So I’m going to say KBANK.