Mos Def looking a bit like Castro maybe, some distortion. This is from an upside down reference photo. I'm using Jack Unruh's drawing method, blind contour drawing starting with one eye and working out from there, creates distortion. But I've noticed if I combine that with a reference to the frame, drawing the negative areas around the edge of the page (I crop the reference into a proportion matching my Moleskin), I get a bit more accuracy. So the Sillitto drawing is a little less distorted. Lorenzo Sillitto is the guitarist for The Temper Trap (sound like a Travis/Deerhunter blend).