@Sam ****
Well, all I know is that the OX is available through some consulates only and that I understand there is a health insurance requirement. Other than that, a 5 year stamp and just the need to make 90 day reports but otherwise having no other interactions with immigration (my understanding is, it's also a multiple entry visa) and considered a long term visa too, is far superior to the DTV, for those aged 50 and over. This is assuming you're able to apply for it, in your home country or another location where it's offered. I understand it is only available to a small number of nationalities such as Australians, Americans and a few western European countries.
The DTV is fine for those with existing Thai bank accounts who come and go every few weeks or months, have businesses abroad and have a need to travel to take care of those companies while spending their time living and working in Thailand remotely (likely being married to Thais).