Hair line, ears, jaw line, nose, cheek bones, position of eyebrows in relation with eyes, all match..
If he was doing meth, his teeth probably replaced with denture.. If a denture, lips always seeem smaller as the room in the cavbity of the mouth is less due to teeth removal..(common with those who get dentiures).. Also, meth David's eyes are blue (contacts I imagine) and larger with slightly different shape.. clean David has smaller eyes.. but pupils are same diameter in relation to overall proportions of both meth and clean David's face.. Plastic surgery on eye shape cannot ve ruled out. Very possible and plausible. Everything else though seems a match.