The new Demo blows the old one out of the water!
Better graphics and lighting. I love the new jumpsuit and power armor.
And the Boss Slither is so much improved. Good telegraphing on attacks, more time to react, and the bugs that you can kill for supplies is wonderful.
Now I'm even more excited for the full release. Definitely gonna try and buy this day 1.
Also I laughed at the lil metroid easter egg after you get the jump suit. Very cute :)