I appreciate your view.
My view is that the Vietnam-US war, 2nd Indochina war or whatever it is called, was just a front of the Cold War.
As you mentions on how the equipment and gear were different despite you served at the same time, but in different place, I would say that it was to adapt with different climates and tactics.
WW2 was in the same case:
The African front equipment and uniform is not the same as it was later in the war. German would not need heavy winter cloth like they would on the Eastern front.
Allies using detailed intelligent to strike require different counter than Soviet human spending.
Soviet early WW2 was still wearing WW1 style uniform with cap, which then simplified to the simple and cheap uniform that they are known for today.
I remember how some member nitpick about US paratrooper figure got uniforms too early or too late or just for a whole different operation than the intended use by the manufacturer.
US Army in the Pacific front might or might not geared the same as they were on Western front.
Was the Japanese invasion part of WW2? Or it was only after the Japan became ally with Germany?
Sir, you served on a front that people threat each other, but no one dare to fight, because it would be a direct battle of super powers, and both side would lose. Nevertheless, it didn’t stop them from opening the fight elsewhere, where dead wouldn’t be their, or they can crush the opponent with little lost of their own while having geographical advantage in the larger scheme of the Cold war. (though, in the case of the US-Vietnam war, the US underestimated the situation a little).
You served on a place where it was expected to be the largest battle ever, where nukes could be detonated, when humanity could be destroyed as whole. It might not appear deadly, but looking back, it certainly needed bravery.