I measured Nacet Stainless Russia blade. It wasn't as sharp or durable as the top two.
If you want to try before you buy, consider checking out the Great Blade Exchange. The link is in my signature at the bottom of this post.When I got a Maggard MR1-standard, I did a bunch of blades, and never hit one that I loved. The Derby Extra was decent in that razor.
When I got a Vikings Blade Emperor, I started all over (I settled on setting 5 for all the testing). I didn't like the Derby Extra at all. So I pulled out the Maggard and tried another blade in it. It was up to decent.
It did convince me that you need to find the right blade for your razor.