Cryteck engine have lot more power and powerfull editor, and a real complete terrain engine.
last time i talked to crytek engineer, they told me ue3 and cryengine2/3 are on completely diffrent tracks and can't really be compared. he said the both engines are AWESOME, both has it's flaws and advantages.
@ello, i tired the same level, works like a charm(i choesd the on pc option btw.), it works as good as ut3 works for me.