Hi Gavin, thanks for sharing your process. There are things I like about both the small and the large version. In the shadow side of the small sketch you've allowed saturation to remain in the shadow but maybe it's a bit too light. On the big portrait possibly the opposite is true, it's gone too dark and the saturation is missing. I would suggest work with the larger one and "clean out" the shadow a bit. Remove the achromatic dark color (hard to tell but it almost looks like black was used) and replace it with a slightly warmer, more saturated dark, to mimic the look of subsurface scattering of light. I would also say be selective about softening edges so that everything is subordinated to the things that need to be in sharper focus, such as the facial features. As examples of what to soften I'd suggest the ear and the terminator (light/shadow border) on the neck. Good luck. I hope some of that was helpful.