The short answer is no. I’ve been reading the blogs from the Windows 7 development team and all indications are that Windows 7 is built on Windows Vista. If you are looking at getting a jump start at Windows 7, go ahead and look into a class on Windows Vista.
Microsoft currently offers 7 classes that target Vista. I highly recommend that you go through the syllabus of each class before committing. You will find sections of each class that are clearly for IT Pros entering the field and sections where you really pick up the new features of Vista. Here is another bonus. The Vista classes are also the stepping stones for Server 2008. Vista is the client for 2008 so naturally what we learn in a vista class also applies to server 2008.
Below are the current class offerings from Microsoft which are Vista specific.
Course 5105B: Deploying Microsoft Windows Vista Business Desktops
Installing and Configuring the Windows Vista Operating System
Course 5116A: Configuring Windows Vista Mobile Computing and Applications
Course 5117A: Installing, Configuring, Troubleshooting, and Maintaining Windows Vista
Course 5118A: Maintaining and Troubleshooting Windows Vista Computers
Course 5119A: Supporting the Windows Vista Operating System and Applications