I use Mint on an older machine with the same ram as yours. It seems a little faster than Ubuntu but that could be false. I think you should go through the package manager and uninstall everything you don't use in your Ubuntu before you switch. I have started to do this on all my machines and seem to have a much better experience. Things like compiz, bluetooth and palm related stuff I never use. It has made Ubuntu crash or lock less and run smoother.
Bookmarks