I have a question and this picture illustrates it well...
The 23 pattern has a very distinctive handle shape reminiscent of fixed blade hunters, where the butt of the handle wraps gently down to help hold the knife from slipping forward, and the slight bulge at the center scale pin 'locks' in your fingers as you grip the knife for hard use. With the second blade closed, all of the handle design benefits are negated. I get they use the same frame pattern on both 1 and 2 bladed knives. But why put two blades on a handle that is so perfectly designed for one blade?
I get it - options, horses for courses, 2 is 1 and 1 is none, buy what you like, etc....
I guess I'm trying to say this handle looks super comfortable in a single blade configuration.