Sorry, I wasn't clear in my writing. I do not believe all US made blue wrapped Personna sold as "labs" are the same. I had gotten a small quantity some time ago and they were great blades. I bought a 100 pack sold as "labs" in the same blue wrapper but they were not as good. Not saying they are bad, just not as good. The box said it was distributed from some beauty supply company.
I have never used the Personna Med Preps made by Acutec Blades in the USA. Both the Med Preps and Lab Blue blades are sold as 'Comfort coated" so I assume they are the same blades with some differences in sterilization. However, there are some folks who insist the Med Preps are superior blades. I am skeptical, but since I have not use the Med Preps, I cannot confirm one way or the other. The Med Preps are more expensive, so I do not see any reason to use them. Besides, I prefer the Platinum Chrome blades. They are more consistent in performance from the first shave to the last, at least for my beard.