I think it still matters to a lot of folks, but I am not one of them. This girl is a Bubble Gum Calico, to be exact, but what she looks like made me buy her, not any line.
With that said, it is already out there that folks will re-label a Calico as Sugar to sell it for a few bucks more. The fact they can easily get away with is says a lot.
IMO Sugar vs Calico does not pass the 10 snake test. If someone put 5 Sugars and 5 Calicos in a bucket, it would be near impossible for another person to then correctly separate them. Extrapolate that to Sugar/Calico combos and it would get even more impossible. This makes me believe they are the same mutation, different label. Just like Butter/Lesser, Banana/Coral Glow, etc...