The short answer is this: one is made by Microsoft and one is made by Citrix.
Sorry -- it was too good to pass up.
The longer answer is that there is no short answer. Presentation Server is an add-on to Terminal Server, extending it rather than replacing it. What I think you're asking is whether you need Presentation Server or whether you can use Terminal Server on its own. In that case, I'd focus on what capabilities you need your remote connections to have and then review the feature set for each.
Related Q&A from Christa Anderson, WinIT
Expert Christa Anderson advises how to map images on a network share for user on a terminal server.continue reading
Expert Christa Anderson explains why it isn't possible to allow drive mapping with Windows 2000 Terminal Services.continue reading
Expert Christa Anderson offers advice for dealing with a crashing spooler service.continue reading
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.