POCO's thoughts:

Right out of the envelope the azo jumps out as having more "presence" -- whatever that means. If you compare the borders of the prints, you can't really say the the azo blacks are substantially different, but they definitely jump out at you in the image area in a way they don't on the Ilford. Some of that may be due to a slightly greater contrast in the azo print, but I don't think that really explains it.

On the contrast question, I was surprised the azo neg printed acceptably on Ilford with #2 filtration. I would have expected it to result in very contrasty print, whereas it's the azo (like I said) that has a bit more snap.

Altogether, there's definitely better tonal separation throughout the entire scale on the azo.