Numbers work as names, and they're easier to generate. If your brand is strong enough, the numbers indicate exactly what they are: variations on a theme. If you

Numbers work as names, and they're easier to generate. If your brand is strong enough, the numbers indicate exactly what they are: variations on a theme. If you only have a couple products, go ahead and name them all, but numbers really work better when you're doing a ton of iteration and minor differentiation in what you produce.