A lot of people believe that sugars are to calicos as black pastels are to cinnamons or vice versa on both counts (whichever your preference) ... Seeing the two mutations (sugars and calicos) side by side my personal preference is sugars by far. To me, comparing sugars to calicos is like comparing lavendar albinos to amel albinos ... but that's just me.
In the very near future, we should have some information that helps us figure out what the relationship between sugars and calicos is ... different mutations, alleles, or whatever.
Until then, it's just all opinions ... and you know what those are like ... lol ... and sometimes mine stink more than most.
-adam