So I don't know that anyone addressed the actual question, at least not directly. While everyone's discussing the effect of carb bore on jetting, the question was about the relationship between intake and carb mismatch
my intuition without doing any specific research besides past experience, and aligned with some of that's been said, is that:
a smaller intake than carb creates a restriction after the carb (speaking in direction f fuel/air mix flow). that restriction reduces the vacuum, maximum velocity occurs in the restriction (intake) not at the carb, and the carb behaves like a less effective carb of roughly the diameter of the intake minimum bore
a larger intake than carb just creates a dead volume but probably doesnt hurt it much. I mean when you're not at WOT, your carb's effectively smaller than the intake anyway. I'm sure it affects resonance, mixing, turbulence etc but I don't expect it to be a huge effect. though I have noticed when you have different diameters, like step changes, you can get gas pooling especially at idle that makes a stumble when you open up.
Also that might be likelier to ice up?
that actually seem correct?