This is constructive critisism, please don't take this as rude/disrespectful.
(I am also keeping in mind it's your first 2 sigs)
#1
The blending is actially not too bad, but the background is so flat behind him, it really fucks up the depth of it all, and makes for a kind of boring piece.
I'd recommend making alot more of the colors blend farther into the signature, watch/look at a bunch of smudging tutorials.
#2
The stocks seems very stretched horizontally, and it definitely shows.
I don't know if u planned it, but the light from the side versus the light against his robe are matched perfectly, adding for great depth in the piece
I'd recommend the same type thing, a little more background to render/stock blending as an image on a background with a little blur smudge doesn't make for an effectively smooth piece
All and all I'd give it 6.5/10 for your pieces, kudos.