Haven't tried it side by side but my Bold is much, much faster. Just was playing around with the browser & couldn't believe how fast it was. My curve was painfully slow.

Scrolling with the trackball is a little slow but manageable. Right now I'd say the only negative I've found is the holster - very bulky & heavy. I like the old plastic ones that are light & keep the phone close to the body.

So I agree with lauriem. So far my user experience has been great. It's a vast improvement from any BB I've had.