EDIT: Checked my physical case again: unlike the picture on Amazon (which must default to the 17" version), the 14" case I ordered from Amazon DOES have the correct number of support struts on the handle and side panels. Beginning to wonder if the ruler being closer to the camera is messing with me, because it would make no sense for them to make an otherwise identical case less than in inch smaller.
Here's that link to the correct model again: https://www.amazon.com/gp/product/B000X22AH6/
This is an interesting point. Upon further inspection, the 14" amazon Artbin I posted a link to above is not only an inch too wide, it also has one too many support struts reinforcing the handle. Back to the drawing board. the 10.5" version is too small -- so maybe this isn't the Artbin Brand? Which is so strange, considering literally every other detail matches.