Possible dumb question here: is there an actual difference between a rear and front road caliper? I'm looking at getting the Shimano BR-5501 caliper for my build, but the front is out of stock, rear is not where I was looking - so it made me wonder what the actual difference is between the two.

Link here: http://www.jensonusa.com/store/produ...ke.aspx?cc=CAD