Sonic and Tails Version 2

So back in October 2014 I made the original version of this picture and at the time it was best digital art I'd made so far, but since then I've been looking back on this and I've wanted to make some upgrades and this is the new version. I changed up the eyes, added extra lighting and shadows on the characters. I think more could be done, but for the time being this'll have to do.