V cuts are still, available in the US and would assume same goes for K's. I have a script and paid cash for the V cuts since my insurance only covered generic. Other than the extra $300 bucks I ponied up, I found no remarkable difference between those and generic. Some of the other variants such as the Serb meds such as Aupaurin are as good if not better.
I had a friend that stringed a bunch of those around his neck chain lol
Imo the cuts are a novelty at this point. If you can get them covered by ins then great but if you're paying extra there are don many better generics made overseas for cheaper. A lot of times it's a placebo effect that makes these branded items better
No difference in potency. They definitely are not weaker but not worth the time and effort imo