The 922 has a slightly deeper motherboard tray than the 932 unbelievably enough. So it's easier to mount a 120mm fan in bottom as it won't usually be blocked by a long PSU. And it can take a 5970 card as well as the 932. The 922 also has rubber strips to support the psu mounting and not just metal like on the 932. The 922 also has filters for the 5.25" bay covers and another for the front intake. It uses thumscrews for the pci slots which I prefer to the 932's plastic retention clips. And finally you can turn off the red led on the front fan. Oh..it also has an 8th pci slot mounted horizontally above the other 7 slots. So ideal for a card cooler, fan controller etc..
In terms of air cooling I believe the 922 is slightly better than the 932 if you add the optional CM 200mm fan to the sidepanel (available from the CM shop) which benefit the gpu cooling as the front fan is slightly restricted if you have a lot of hard drives. But it's really the CPU cooling that's a little different. The 922's top exhaust fan is placed very close to the cpu heatsink so sucks hot air right off it. The 932's on the other hand because it's a taller case has the top cpu fan positioned a good 3 or 4 inches away from your cpu fan. Basically the hot air on the 932 compared to the 922 has further to travel before being expelled. One last thing there is ZERO difference in specs between the 932 230mm fans and 922 200mm fans. Both in fact have 190mm blades. It's just the frame that is wider on the 932.
The only reason to buy the 932 over the 922 is if you 1. prefer the 932's looks, 2. want to do water cooling as it's got way more room in top, 3. plan to replace the side 230mm fan and/or top 230mm fan with 120's - the 932 can take 1 extra 120 in each location, so again way more suitable for larger rads for water cooling or 4. just want extra 5.25" bays.
Personally I'd get the Raven though. It cools very well. I know this first hand now as my mate is cooling a spec very similar to mine with slightly better results. All sites give it mega reviews for cooling bar bit-tech who based their review off the custompc mag review. The fact is if you have dual slot video cards which exhaust hot air, the bottom fans are going to help with that, and any extra hot air will be vented out naturally at the top and not get trapped. So the single 120mm exhaust fan is enough. And it's dead quiet and looks killer. It has 8 pci slots too so tri fire is easily done. Plus you can pick up spare silverstone 180mm fans from many US online shops. It's only 2 minus's is it officially only supports 10.5" cards but you can definitely fit a 5970 you remove the middle bottom fan grille and it only has 3 hard drive bays, but it comes with a bracket to fit an SSD on the back of the motherboard tray. I'm planning to get it's brother the Fortress FT-02 when it comes out in December. It should be even quieter over the sidepanel dampning, has unibody aluminium contruction, and can take up to 12" cards. Only 7 pci slots though
) I leave everything running more quietly.