Check out this screen I took today and look at the mountains and city in the background:
http://cloud.steampowered.com/ugc/542900342959635338/5945EAE8FBF7785BD71F16C4992E93ADCCD50A22/
Just Cause 2 is 100 sq miles of open world.
Crysis is also open world, but not nearly as big.
In Just Cause 2, you can fly across the island going 250 mph in a jet, parachute out, and grapple on to a moving car. With no pop-in.
The screenshot I posted above was taken from a moving jet.
And then we have the fact of how well they run.
I can barely get medium-high settings on Crysis, but I can run Just Cause 2 maxed out 50fps, 1080p.
The Avalanche engine is very well optimized, and even on console it looks good. The Crytek engine is full of dirty code, and it can't run on consoles.
I hate it when people say "Crysis looks so good, thats why it can't be on consoles herp derp." If the engine was optimized better, it could run on Xbox 360 locked at 30fps just fine. (With reduced textures and shaders)
Crysis does not deserve all the hype it gets, and Just Cause 2 was an amazing game that never got any recognition, but achieved far more than Crysis did from a technical standpoint.
Can you do this in Crysis?
http://www.youtube.com/watch?v=xFpXNdQN16o