I was told years ago that the unvented was used on the cars that spent lots of time idling around in traffic, and the vented were used on cars that spent the majority of time on the freeway.... fwiw.
If the brand sets you listed I'd not use any.
Get a set of echlin points from napa the upper quality set that they sell.
I wouldn't worry about vented or non vented as I personally have seen 0 difference in the two.
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