Sure, go ahead.
I actually haven't even tried yet. I was kinda afraid that cloning that area would make it softer, but since it's softer anyway it probably won't matter.
I think I like the first one more too... Hard to say. The soft corner kinda ruins the second one for me. I might play around with it (too lazy to re-shoot it right now) and see what I can do. I think if I can make the other corner as soft as the top one it'll be OK. Either that or covering it up with some vignetting, but I don't think that would work very well with this image...
Hmm... I just gave myself an idea for a new picture of this. I'll have to rig up some kind of support for it though...