The wildfire is htcs baby. It's bottom spec. Lowest processor and ram in it. Android is very laggy on it. Freezes and shuts off a lot because it can't cope with the software. They have brought out a new one since I had one but it's not much better
My mate has a Wildfire S and the 512 meg local storage does his head in. There is only 180meg or so for apps with the OS taking the rest. Pain in the rump when not all apps are happy on the SD card
I have a desire hd as a work phone. It's pretty good, screen is excellent. Taken it far share of knocks and still intact. But side by side it's the iPhone every-time for me even my old 3GS.
I have the wildfire... speaking plainly its an absolute pile of crap!! Avoid at ALL costs!
Only reason i have one is i broke my last phone and had no phone insurance at the time.
Wildfire is bottom of the range and is extremly unresponsive and slow.