Both of them look really great. the only thing that I see that makes me wonder - and this might actually be on purpose so its not really a criticism as much as an observation - is that the skin surfaces seem to be a litle overly rough like there are too many little creases and wrinkles.
Now that may be how they really look - but nobody sees all though creases without a magnifying lense , so it looks a little odd to actually be able to see them - does that make sense? Realize I'm NOT an art critic and what you've done here is so far past my skills I feel like an idiot making commnets but you asked for an honest Crit... So here it is It looks fantastic, but a little "off" to my eye... the offness to me seems to be in the skin - it needs to be a little "smoother"... I know that sounds stupid but there it is...