Snaggletooth,
The questions are easier than the real test per se predominantly because the Kaplan questions provide a lot more information, much less distracters, and many more "keywords" or signs. They make getting the diagnosis somewhat straightforward where as on the exam itself you have to do much more critical thinking.
The Kaplan questions are picky however. It was the same format on Step 1 Q-bank as well in that many of their questions are more technical. For example Kaplan Q-bank on several questions asks for a specific vent settings on an ICU pt, or calculate the fluid vol in a burned pt w/specific areas of body burned... Step 2 (at least in my experience) didn't have this, rather focused on more critical thinking questions rather than technical ones!
Best of luck