cool progress jramauri, I'm really digging the hair modelling - a little maya hair or shave and cut strands sat on top would really bring out the realism!

I think the eyebrows stay a little too fat along to the end compared to the reference shot and makes them take a little too much prominance in the shot.
The inner nostrils are also looking a little puffed out compared to the reference and could probably do with thinning down a little bit.
The lipstick is a little bright and makes the mouth look a little more pouty than the reference but that might be what you're after

keep at it, its getting better with each update