Xpleet: I could only judge from the Youtube videos not having a proper system ; for me it looks like CryEngine beats Vue on many aspects...I was watching the living ocean for example; I don't know how many days would it take to create that texture not to mention rendering it; it simply wouldn't work.
I can't tell much more until I ran Crysis on a top system; I hate to say but CryEngine really beat Vue on many things despite what you say; it's almost embarrassing that it renders in real time...I think that with the latest graphic cards (Nvidia 8800 GTS) the mentioned artefacts maydisappear.
I can admit that the CryEngine can't render Global Radiosity so indeed the shadows or black areas look a bit strange...I can't say more without testing it on a high-end system; I just wish Vue could learn something from these guys.

Another impressive thing is that I can load a 800 Mb Crysis file into the editor and it moves around smoothly...it would be impossible with a Vue file!