There made from wood, and wood is a “living” material. No two individuals are going to be identical. There going to be similar at best. The specified characteristics are basically an average.
I think that CR is a UV Light treatment of the top ply that hardens it. But it is not a varnish or sealant. My memory of the CR blades I have held in my hand, the top ply of the blade felt like naked wood. I think Stiga's NCT is a layer on top of the wood that would be like sealant but much harder than a normal sealant. But CR, I think that they are treating and hardening the top ply with some process having to do with UV (Ultra Violet) light.
Why don't you just get a clipper? Not much difference in price.
Otherwise, ask your friend for the weight and thickness, ask the shop for something similar.
Here Lasta is definitely right. If you are hoping for the blade closest to a Clipper, it is definitely a Clipper. The idea of insisting on getting something else that is "like" the original thing is kind of silly. They are all good blades. But Clipper does have a kind of unique feel to it. I have played the Extreme S. It is a great blade. But it really does not feel like a Clipper. It also does not have the same kind of sound as the Clipper.
Get a Clipper or decide you want something that is not a Clipper. But the other blades really are not going to "like" a Clipper.
It is also interesting that this last post of yours makes it sound like you are hoping someone else can make up your mind for you. Regardless of which blade you choose, you are going to have to make the choice yourself.
None, both are way faster than Clipper. If you want something like Clipper with an I creased speed but not hard to control go with Yinhe Pd 437.437. The most underrated 7 ply blade in the market.
What about this
Batch variation. Note the part about "weight and thickness" makes more difference than which brand.
Officially, most of these blade state 6.7mm. My Clipper is 6.5, CS7 was 7.1. Thus CS7 was faster. Now, if someone comes in with a 7.2 clipper, sure I'll yield.
What about this
clipper is definately not faster than samsanov force pro black i can assure you
