MAC Loose & Lively is a warm sheer with a cream finish that is limited edition and retails for $22.00. In comparison, Guerlain L'Oiseau de Feu (901) is a neutral sheer with a pearl finish that is limited edition and retails for $30.00.
Guerlain L'Oiseau de Feu (901) is 95% similar — it is less pigmented.