The Destination Thailand Visa and the Long-Term Resident visa solve for different situations, and the right starting question is not “which is better” but “which matches my income, assets and intended length of stay.”
The DTV asks for the least up front: 500,000 THB held for three consecutive months, plus either remote income or enrolment in an approved cultural programme. In return, it grants five years of multiple-entry access with stays of up to 180 days per entry, extendable once. It suits applicants who want a lower-commitment way to spend extended periods in Thailand without meeting a high income or asset bar.
The LTR visa asks for considerably more — from USD 80,000 a year in qualifying income or passive income, up to USD 1,000,000 in global assets for the Wealthy Global Citizen category — and in exchange grants a ten-year visa (five years, renewable for a further five), annual rather than 90-day reporting, and, in most categories, an exemption from Thai tax on foreign income remitted the year after it was earned. Two categories, Highly-Skilled Professional and in some cases Work-from-Thailand Professional, also come with work-permit provisions that the DTV does not offer.
For most prospective applicants, the deciding factors are: whether your income or assets clear an LTR threshold at all; whether a five-year or a ten-year horizon better matches your plans; and how much weight you place on the LTR's tax treatment and lighter reporting burden. A consultation is generally enough to work out which route is the better fit for your specific numbers.