For all screenshots, left is beta, right is final, unless only 1 screenshot is shown, then it's just the beta..
If you approach this area near part 2 of Act 1...
...then run up the slope along the wall...
...the game will start showing weird-ass graphics...
...that eventually scroll away to a black screen you can't escape.
Other than that, the only differences include monitor changes...
...ring placement...
And the addition of these pillars in act 2.