I'm pretty sure he did all of them. All of them look as though they've been cut by the same person.
Btw, I think (I'm not sure) you're using feather. Please dont. Feather looks horrible when you're copy pasting a cut onto a dark background. It just sticks out like a sore thumb. Don't use the blur tool either. If you've messed up, press CTRL+ALT+Z or just give up because this also looks bad when you're copy pasting the render onto a darker canvas.
Other than that, keep it up! Looking forward to seeing how this pans out.