There definately is a difference, although it seems like google offers slightly more intelligent searches (finds more of what you were searching for), if you were to compare the two. I both like and use Bing because it seems more clean and has a nice image with it, and I don't surf the web too much other than by using my favorites.
I use Bing desktop on a couple of my computers, but I notice there is a few seconds delay with it enabled vs the normal desktop (to be expected, and hardly burdensome). I also notice that using it is just as easy as using Start>Internet, or clicking the icon on the desktop/taskbar. So I hide the Bing bar at the top and just enjoy the different picture every day (not to mention I've got into the habit of clicking the little IE logo instead; I hardly ever think of the Bing bar).
Perhaps someone will think something is up when one day they see me turn on my computer to the image of flowers o.0
Bing (formerly Live Search, Windows Live Search, and MSN Search) is a web search engine (advertised as a "decision engine") from Microsoft.
As in this thread
, the name change is constant. Do note that the search engine is advertised as a decision engine, so it will be different. Just what that means is not known by me.