This document compares performance benchmarks of the .NET StockTrader sample application running on Windows Server 2008 R2 and the .NET Framework 4.0 versus IBM WebSphere 7 running on an IBM Power 570 server and HP BladeSystem. The benchmarks tested a trade web application, trade web services, and a WSTest web service. The .NET implementation outperformed WebSphere across all benchmarks, processing up to 3.5 times as many requests per second for the trade web application and up to 1.5 times for the web services benchmarks. The document also provides pricing details showing the .NET solution to be less costly to implement.