Is there any practical reasons for walnut other than looks

[Chippendale]

There are, according to Wikipedia,13 species of Beech tree.
In my original post I was only stating that there are differences in weight and it varies from under forty to over forty lbs per cubic foot, I wasn't being argumentative just trying to be informative. I don't know which specie is used for gun stocks.

I have over thirty guns in my rack and without checking I think only four of them have Walnut stocks the rest are, I presume Beech, though some are stained a darker colour.
I have worked with Beech, retired joiner, I still have some small pieces in my workshop, It was all steamed Beech though.

Chippendale (with clothes on)