Lisa Eldridge Illusionism is a cool duochrome with a sparkle finish that is permanent and retails for $16.00. In comparison, Pat McGrath Astral Lilac Aura is a cool lavender with a sparkle finish that is permanent in palette and retails for $25.00.
Pat McGrath Astral Lilac Aura is 90% similar — it is more shimmery, cooler.