One of the most noticeable features of female Aes Sedai is the ageless appearance of their face. They don't start out that way, but it develops the longer they've been using the Power.
But do male Aes Sedai face this same effect (see what I did there)? Are there any mentions of it? I recall Asmodean looking like a middle-aged man, but that would imply he actually does appear a specific age - not to mention that the Forsaken seem capable of changing their looks.
Is it possible we don't know, since men who can channel rarely live long?