[ACHlLLES]

Speed will depend on roms and tweaks you have. I personally like JD's rom since it's pretty much made for sprint users.. but I have a feeling droid would be more smooth operator on the OS part since the OS is well taken care of unlike all step child WM devices.

Ram usage will also depend on which rom you use, but HTC sense UI is a total memory hog, and the more memory it uses, the more smoother it runs IMO.

I can only suggest you to use the 30 day return policy and try out both. I personally dig Droid, but I'm not a fan of paying more than what I'm paying for sprint since I already have money wasted on a iphone 3g for my wife.