There are differences in Steels, Grinds, Hardening and Tempering.. besides all the differences that are only skin deep.. Weight and Balance also play a role in shaving comfort..
These differences are what fuels the chase to own "Wow" razors, luckily they are not equal to all faces..
My version of the perfect razor might not be the same as yours, which makes this sport more interesting all the time, because there is no "Universal Best Razor"