The 902 does have removable HD bays while 600 doesn't. The HD bays are similar to CM Stacker. 120mm fan will attached to rear of bay, you remove them through the front, and change location if desired. The 902 has Black chassis, 600 grey. Other than these 2 differences, Both the 600 and 902 have the same built-in fan speed controller and led on/off switch. Overall, I'd chose the 902 for easier access to HDs.
I got swamped, so I didn't have much time for taking photos before shipping it out. I still need to edit the 902 photos too!
The exterior finish is a custom mix of Silver Metallic and Gloss Black PPG automotive paint. I absolutely love how this color came out. I would consider painting a car this color... We imagined it on a `68 - `72, Chevelle, Malibu, Nova, or GTO. This case mod was inspired by my love for Hot Rods if you couldn't tell...lol