You mean preformance wise? The retail 32mb ddr is the best and can be overclocked higher due to the 5.5ns ram where as the Le (not sure about VE) has 6ns ram that i feel tops out at about 190. Im pretty sure the 5.5 can go 200+. The Le's only drawback is that it has the 6ns ram and no hyper-z, but as you know theres an edit to enable it. I dont know much about the VE other than im pretty sure its got the 6ns ram and is clocked to 148/148 aswell. Im sure i didnt answer something as i answered quite fast so if i missed something ask me again.
I thought the VE was the same as the DDR?
I could be wrong though. Don't worry about its clock speed, it can be set to anything you want within limits anyway, as well as all kinds of registry hacks.
Go over to www.rage3d.com and download the Radeon Tweaker.