Just because :) Someone mentioned these might be similar, so I thought I'd swatch them together. It's a slow evening.
Alone (SH on left, CG on right):
Over black creme polish (SH on left, CG on right):
Side by side (from top to bottom, SH, CG, SH, CG):
The main difference between these two is the size of the glitter. Disco Ball is tiny, tiny flecks, while Snow Globe is big shiny bits. The colours are pretty much identical, flashing all colours of the rainbow. Both are neat, but I think I prefer Disco Ball as Snow Globe seems to sink into my nail and make it look pitted.