We have all types of P2P applications, but I don't think there are any substantial difference between the functions and features of each P2P program. Lots of these P2P clients have a large network of users which they boast of, fast search results, as well as
fast downloading capabilities. Almost all these damn programs have multiple downloading capabilities along with integrated chat client features. For fast downloading capabilities, I think what matters most is your internet connection, don't you think? But I think what sets these applications apart is the bundled malware each one has, while some other P2P clients come as clean as clean could get.