Original Slim X360 was rushed and looks like turd.
Look at that back, the new out (SPDIF) is round, rather than square, hdmi-out is metal, nothing has been optimized... looks like a PC made to fit generic motherboards.
Why is that you ask? because the new out was given as spec, a radius (that's common, just to ensure it fits), the designers are not engineers so they might not even be aware of what it was, they made a mock-up with leeway for the given "specs" and... microsoft produced the motherfucking mock-up as rushed as they were to get it out of the door.
VILE.
From a designer standpoint, you just know that console had the redesign part of the job unfinished, they didn't let them finish, they deemed mock-up as good enough. And it isn't.
XBox 360 E for comparison:
That's better.
And I don't even think it looks good, or like a X360 upfront. The X360 Slim E... I like.