http://jalopnik.com/396442/2009-audi...dy-on-the-ring
The first picture is the V10 powred R8, and the second is a regular V8 powered R8. The differences are sorta hard to see, but the grill on the front has larger spaces, there are only 2 blades on the air intakes under the headlights, the rocker panel sticks out farther, and the sideblade on the side of the car that lets air into the engine is larger on the V10 powered one. Scroll down and you can see what I mean.
http://bridgetogantry.com/index.php?...d=186&Itemid=1