Both are great engines, and I'm just eager to see what Mr. Sweeney has for Unreal Engine 4.
Here's a custom Crysis map someone made recently,
http://www.nvnews.net/vbulletin/showthread.php?t=106965
[screenshot]http://www.abload.de/image.php?img=5ivwmq.jpg[/screenshot]
Man, those Crysis screens look so much better than how it looks on my PC. I have to run it on medium details at 1024 by 768. Clearly, high quality is light years above the medium setting.