I wrote a comparison for .net vs. java (before the current web adapter model) back in 2007 which is still in the forum archives Java or .NET that might be helpful. But if I remember correctly, starting in 10.2 or 10.2.2 there was only one version. That is, you no longer have to specify the flavor you want. But maybe you are asking IIS vs another (JAVA) web server, in which case, I can't be of much help.