HI Thanks for writing here.Althea pills
contains cyoproterone acetate which is a synthetic steroid with anti androgenic properties,while sophia contains gestodene
which is third generation progesterone
without androgenic side effects,so as far as acne is concerned both pills are safe,but it is safer to take sophia since it is free from other side effects such as weight gain,liver toxicity etc.Only major concern for sophia is devlopment of deep vein thrombosis
,so please have awatch on it .Take care.