The Pale Chocolate is around 200 L, compared to the 400-450 L you get with regular Chocolate Malt. Aside from being lighter in color, it really gives more of a chocolate flavor and aroma, compared to Chocolate Malt coming across as more "roasty" when used.
I've made this beer before, almost 2 years ago. It was my 3rd brew then (and extract), and the hops used were different (Cascade and Centennial), and it wasn't dry-hopped. Aside from all that, the bit of Pale Chocolate added a very slight, but nice, chocolate touch in the flavor.