CW compared to local "province" Immigration Offices

It's my understanding that CW is more by the book and follows documented requirements.

For instance I have heard some local Immigration offices (Jomtien) requiring 800k "seasoned" funds for the initial Non O retirement visa. Meaning they want to see bank documents showing the funds deposited for at least 2 months before Non O application. This is not per documented requirements.

Differences:

1) CW only requires that 800K THB be in a Thai bank on the day of application

2) They do not require  "permanent address" documentation. A Hotel is sufficient of the initial Non 0 application.

question: if it's OK to be in a Hotel on the day of application ( using CW office ) what documentation do they want? Hotel booking? Or do they simply look up and make sure that the Hotel has reported you as staying there on the day of application? TM30?

What other differences do long timers in Thailand know of? I've lived both in BKK and Pattaya and used both offices. Last time in CW was around 2016.

What are the differences lately? Especially in and around a Non O for the purpose of retirement.