They both have a bit in common. They’re both communist Asian states that the US went to war with during the Cold War and did not win. But the messaging regarding the two states is a lot different. DPRK is treated like the worst dictatorship ever, that kills you and your family for even thinking that the Kims are less than gods, whilst also starving. But Vietnam, they say… nothing.
Why isn’t Vietnam demonized like DPRK?
The DPRK is extremely isolated. It can say basically whatever the fuck it wants about its enemies and there’s no consequence because what are they going to do, sanction it more? And what would its enemies do if it attacked them less, sanction the DPRK less while the DPRK still maintains its nuclear program?
Vietnam actually has diplomatic relations with the US and many others where it stands to benefit by playing nice.