Wurger,
While this one IS older, I don't like apertures more, for the reason I stated & don't put them in a positive light.
If the front post or blade is the right thickness to match up correctly with a single-level rear notch that's not too wide, for me that notch clearly defines the post & eliminates the double-blurred affect the apertures create.
Something about the way light transmits around the post in the notch. If I raise the post up out of the notch, blurred & doubled. Lower it back down into the notch, clear as a bell.
I've seen other shooters express the same preferences.
For most, the aperture's better.
Just not for all
If it works for you, use it. If it doesn't, use what does.
Denis