Transferring into Upenn?

<p>I want to transfer to Upenn next year or if not, eventually go to med school at Upenn. If I were to transfer or graduate from schools like Cornell, Brown, or University of Chicago, which would generally have the better chance (granted I have the same academic fervor in each school). I've heard the grading is a bit different for each school. Any bits of comparison between these and possibly any other iv league schools would be appreciated!</p>