There are many differences and similarities between cosmetology and esthiology. A diploma can be obtained for cosmetology in 10 months at a vocational school, 5 months for esthiology. Both people may work in a spa, salon or resort, however while a cosmetologist can become an esthetician with additional training, an esthetician is not trained to perform cosmetology services. Esthiology is a branch of cosmetology focused specially on skin care. But before we look at the differences between cosmetology and esthiology, let’s look into what each of these professions entail.