Im not a snob and I don't have a problem using a production knife. I have to say I would completely disagree with these two statements though.
For me, getting a custom would be all about the fit and finish and especially the performance. The technical differences IMO are a huge part of the difference.
How would you explain technical differences not adding up?
Kevin, fair question. I'm very heavily biased by my experience in the bike, ski, hiking and software business. I think there are 4 areas to consider:
1) Aesthetic Customization - Custom stuff gives you the ability to get something out of exactly the materials you want with exactly the look you want. No question on this. Custom and production are light years apart in this regard.
2) Custom Fit - This more of an issue with hiking boots, bike frames and software. Some people/organizations truly need something that is hand tailored to their specific situation to be able to perform. If you live in New England and hike, you've seen Limmer Boots. Last I heard the waiting list is well out over 3 years. If you have an impossible to fit body, you need to visit Limmer. But, we're talking about the tiny ends of the bell curve here, even with things as hard to fit as hiking boots and bike frames. Much less of an issue for knives.
3) Fit and Finish - In the 70s, it used to be that hand built bikes were far superior to crappy robo-welded bikes. By the mid 80s, robotics were producing more consistently brazed bike frames than production hand brazed shops. Custom makers still own the territory of pushing knives (or bikes or boots) well out into the land of art. But that's beyond mere fit and finish. To my mind, that's the territory of aesthetic customization (#1 above). Take a look at Victorinox SAKs, a knife I don't really care for. By all accounts, their highly automated production facilities are incredible and they put an incredibly consistent product. Very, very, very few custom makers can achieve and sustain that level of fit and finish at reasonable costs. Custom products are "bespoke" and unique. There are custom makers that do achieve high levels of fit and finish - don't get me wrong. But I've seen as much variance in fit and finish among custom stuff compared to what can be done with modern production that I consider this dimension to be a wash. It just depends.
4) Construction Durability and Performance - I work as an engineer so I'm going to be a bit dweebish on this. By durability and performance I mean really only those things. A knife needs to open, close, cut and stay together. There's very little hidden here in terms of the engineering basics of a folding knife - no real secret sauce. The OP noted the his Case has started to wobble. I would have to think that either he got a sub-par Case or (as many of us have done at some point in our lives) pushed a slip joint too hard. There's only so much the design of a slip joint can take, even if hand made by the most careful artisan. Let me put it this way, knives made of comparable materials and put together according to the same basic design are going to perform and last comparably. Putting yet another way, when I test or use the produced object, I don't see who made. I only see steel and other materials.
I should note that I think there's a deeper thing going on here. I see this particularly among cyclists who spend thousands on custom bikes but I think it's true more or less universally in our culture and that is the need to justify custom stuff in terms of technical performance. My sense is that this is rooted in a hyper-technical social ideal - sort of shared belief that one thing can be really better than another and that this is tied to cost. It's really almost required to justify any cost with that being tied to a corresponding improvement in technical performance. The problem is that modern production capabilities has pretty much removed that from the equation. To my mind, it's absolutely fine to pay for a custom product just for the fact that its handmade and beautiful. It's produced by an artisan and, really, that is enough. No mass produced thing is ever going to be the same as that. And that alone justifies the price.
Let me put it another way... I've dealt with people in many other contexts who said, I didn't get the performance I wanted out of production X so I'm going to buy a custom Y. Awhile later, they've not gotten what they wanted from the custom either because functionally there's really not that big of a difference. Aesthetically there is, but not functionally.