Artloader - Sketchbook

[Skeffin]

Good to see you're doing fundamentals like drawabox, and proko's anatomy - I bought the full version and would honestly say it's worth it, but that's because I have no head for learning anatomy on my own. If you're doing portraits, I found it really useful to use an Asaro head when doing photo studies, to help me break down the forms.
Someones already mentioned the colours in the comic study being more washed out than the comic, I'd also add that the values in your study seem to have less contrast. Turning the study and the source image to greyscale helps me check if I'm deviating too far.