No we don't have a comparison of the dll's for TTF versus Test Studio. It hasn't been needed thus far. We do have this documentation for what TTF comes with and how to use it.
If you haven't already figured out, Test Studio is built on TTF. That's why you see ArtOfTest.WebAii plus the additional DLL's that Test Studio uses.
the Telerik team
for a live 'What's New in Test Studio R1 2011 SP2' event on Tuesday, July 19 at 2pm EST!
Have you looked at the new Online User Guide
for Telerik Test Studio?