the bottom one, the tori is poorly cut out, it has a big pixelated hole in the elbow, also blur it in a bit to make it less pixelated
the top one is simple but good, a fox and a red glow. but looks nice
Best (but most tiresome way) to cut that render out is to zoom in to 500 or 600, even 800, use the lasso tool, and cut out small parts That's the hard way but it's more rewarding because it looks better. Nice job for a first