I'm hardly an electronics guy, but I have done a bit of monkeying around with amplifiers and soldering irons, including wiring up a few guitars. Yes, those are orange drop caps, as far as I know. Caps are caps, in my opinion, and whatever is least expensive and has the same spec is all good in my book. A 500k pot is the same as any other 500k pot from a purely functional standpoint. From the standpoint of smoothness and longevity, there's a difference. You get what you pay for. I assume Gibson gets a decent deal on decent quality pots and uses decent quality pots. Other than that, I wouldn't know what differences they may have. My guess is that the differences are irrelevant, since you buy pots based on value and quality, not some other spec. Resistors can be a bit different from caps and pots, as I discovered modifying a Valve Junior amp, but I would just use whatever cap is the right spec. Same with pots.
Capacitors store electrical energy. In a tone circuit, think of them as acting like a shock absorber. The absorb energy, especially the higher order overtones. That darkens the sound. You can think of it as thumpier or as duller, depending on your point of view.
As a purely shade tree mechanic and electronics hack, I probably have some stuff wrong here, but with any luck, that's a start and it's enough for an actually knowledgeable person to work with to correct all of us, including me.