Wanna know something even funnier? I've seen as much as a 500rpm difference between "identical" props from MAS on the same engine, one run right after the other.

Also, if you use MAS props, you should always shave off the flashing along the LE and TE of the prop blades. It actually can result in a few hundred extra RPM, and it can reduct the depth of any cuts on your fingers. (never cut myself with a prop, so I don't have direct experience with that last one).

Anyway, the point is that props can vary a bit no matter what they are made from. And the variance can be noticeable or measureable, but usually isn't worth the effort.