Well, I share the dislike of norton's porousness yet I haven't been banned yet And for the right amount I could disclose the name of another mod who's in the same camp....

I don't know what other advantages you'd expect. To me it's a hone, it removes steel, I care how fast it does it, what is its feedback, and how much pain it is to maintain. Oh, and the price of admission is somewhat important.
If these are your first hones to you may be of importance the people who are familiar with a hone in case you need honing advice. Right now the norton definitely has an edge there and I'm sure Lynn and Don will help as much as their time allows with the new stones.

Just as I'm writing this my norton is being replaced by 5 & 8 naniwas - amazing ain't it