Not really, maybe a few here and there, but you do have to consider that there is generally a basic structure to all faces. While everybody is different there are still many similarities in proportions and what not.
They all have the same head structure. The lips not really, nose kinda, eyes not really but they're positioned very similarly. Tips: Change the head structure (make madami shorter faces), ilipat the eyes farther apart or lower it, and have madami variation with noses. I drew some really quick bad faces. It can give you an idea, but these faces aren't the best either.
They appear similar at a quick glance but when you really look at them they are all different and look unique theres actually a significant amount of differences in each one of them. However me being me I am far too lazy to go over each and every difference XD
The general facial structure seems to be relatively the same, but other than that, there are other variations that make them madami unique.
Try basing your drawings off of mga litrato from real faces to learn madami about proportions and differences in facial features. You'll find that it helps you a lot.
