From a Korean perspective, Vietnam is better than Thailand for family travelers

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First of all, from a Korean standpoint, Vietnam is closer than Thailand.
Excluding nightlife and massages, general tourism prices are cheaper in Vietnam.
Vietnam's natural scenery is also a step above Thailand's.
That's why wholesome family travelers might prefer Vietnam.
Ultimately, I think it's a matter that varies greatly depending on your purpose.
If the purpose is nightlife, Thailand is the absolute best choice.
If it's wholesome tourism, both Vietnam and Thailand have their own competitiveness.
That's why wholesome tourists don't understand why people go to Thailand.