ColourPop These Boots is a cool fuchsia with a frost finish that is limited edition and retails for $4.50. In comparison, ColourPop Solstice with the Mostest is a cool fuchsia with a sparkle finish that is permanent and retails for $4.50.
ColourPop Solstice with the Mostest is 80% similar — it is more shimmery, lighter, cooler.