Here are some of the things that are different about the Street Rod vs. the VRod with a lot of my opinions interjected.
Everything about the Street Rod is better than the VROD except for the looks. It's all HD'ed out now. It's not clean and reserved. The gas tank is bigger now, 5 gal instead of 3.7 gal. You can get more lean angle. The forks have been changed to inverted ones, the fork angle is down to 32 degrees from 38. The pegs are under your feet instead of out in front. It's got Brembos now. With the revised bars, you can either hunch over, sportbike style or sit back. The wheels are 10 spoke instead of that solid rim crap-o-la.
I like the pipes better on the VROD, they have a contour to them. The Street ROD just has big straight pipes. The Street ROD is upgraded with more chrome that I could do without. The thing I like the least is the paint job on the faux tank. I liked the simple HD raised logo better. I also hate the louver chrome things right in front of the tank. They say the seat is hard but comfortable even for long rides. There is no shield or fly screen on the Street Rod. That bike is also a lot of money at $16.5K. Plus you would need to add those beetle bags from Corbin which look sweet but are also expensive if you wanted to do any touring. For the screen, you could install the Corbin Trim Tab, which looks like it should work well.
Here is a good review and lots of big images...
http://www.motorcycle-usa.com/Article_P ... cleID=1899#