OK y'all... here are some pics I took of my 633MHz (sized down to 1024 x 768). As you can see, compared to the 900MHz there are a LOT of differences.
Close-up of PSU Sticker
Back Side (I/O)
Close-up of Back Top
Close-up of Back Bottom
Close-up of Front Top (LCD)
Close-up of Front Bottom (Logo)
Product Label (on left side if facing the front of the unit)
Primary & Secondary IDE (note 50-pin IDE2)
FDD Connector (26-pin) (Also note silkscreened "Sahara 3810")
Socket 370, DIMM slots, and HDD
PCI riser, HDD behind (Pan right from previous pic)
I didn't feel like disassembling this thing to get any unobstructed views of the processor and HDD. If there's any other views you want to see, let me know.
Also, someone with a 900MHz, please measure the exact dimensions of the PSU. It is a different form factor than the one used in the 633.