TL;DR: Angel marked a turning point in perfumery by popularizing the gourmand register, and Alien followed a similar logic in a more floral-woody register — two Mugler best-sellers still compared, and sometimes even layered together.
Angel: the perfume that created an olfactory family on its own
Angel is regularly cited as one of the most influential perfumes in modern perfumery, largely responsible for popularizing the gourmand register (patchouli, chocolate, caramel) that has inspired countless compositions since its launch. It's a fairly rare case of a perfume that genuinely created a trend rather than simply following one.
Alien: the same boldness, in a different register
Alien takes an equally bold compositional approach as Angel, but in a floral-woody register (jasmine, cashmeran wood) rather than gourmand. Both perfumes share the same philosophy of dense, instantly recognizable composition, which explains why they're so often mentioned together.
Angel/Alien layering, a recurring practice among fans
A use case regularly shared by the house's enthusiasts: combining a perfume from the men's A*Men line with Angel to extend its longevity and enrich the composition — a claimed layering practice that speaks to the coherence of the olfactory palette the house has built over time.
The "Taste of Fragrance" flankers: worth exploring
The house has developed a range of flankers exploring more specific gourmand facets (bitter chocolate, salted caramel...) that let you rediscover Angel and Alien from a new angle, regularly praised by the house's longtime connoisseurs for their ongoing creativity.
Why these two perfumes remain essential
Beyond nostalgia, Angel and Alien continue to be recommended to anyone who wants to understand the origins of the dense gourmand and floral-woody register that still dominates a good part of contemporary perfumery today — two historic references worth knowing, even without necessarily wearing them daily.