The looks of the two coolers are polar opposites, and although they use the same fans, they are quite different. The v1 used a thumbscrew clamp to attach directly to the DIMM slots. This worked very well, but left you modding if you used tall ramsinks for there was no wiggle-room at all. OCZ has remedied this in revision 2 by suspending the cooler much higher via the use of spring-steel prongs that both act as clamps to attach the cooler, and act as stilts to suspend it above any oversized ram sinks such as OCZ's Flex and Reaper series have. It still attaches via the DIMM slots, but by tension.
Installing was a slight headache for me due to the fact that the spring steel used for the clamps had a bit too much tension in my opinion. After trying to adjust or bend them (to no avail) I bit the bullet and clamped them on as-is. To my relief, nothing snapped, but a word of advice: when installing, hold both clamps open with both hands while you hook the prongs over the DIMM tabs. If you were to just try to pull one end while the other was in place, I have no doubt that the ram slot's tabs will break free of the motherboard.
The power lead is plenty long enough to reach any motherboard's ram fan header, and is a standard form factor 3-pin in case you have plans for an aftermarket fan-speed controller. The fan speed switch is a welcome upgrade for those looking to quiet their cases down or crank-up the CFMs for maximum cooling potential.
The open-top design is much better on the XTC v2. The v1 had the fans obstructed by the cooler's body, and muffled the light given off by the fan's LEDs. As much as I loved my chrome XTC, this sleek black brushed aluminum looks more at home in my case. Also the open top allows me to monitor the dust build-up underneath, which is always good to do when blowing air directly into your ramsinks.
Testing is up next.