Exactly? That's tough to say because it probably changes from version to version. Basically, the developer of Acquisition has written very nice graphical user interface (GUI) for Jaguar users that tweaks the open source core developed by the LimeWire Project and adds some nice iTunes integration. If you want to know more, try http://www.acquisitionx.com/ or search these forums for "Acquisition."

If you aren't interested in all the info the LW GUI provides like the advanced stats, vendors, connection details and alternate sources, you won't miss these features in Acquisition.