Heatsink Top:
Extrusions are nothing new, and this particular heatsink doesn't do much to innovate and improve things. With cross cuts on the outer fins only, the bulk of the fin section is seamless, with only the center clip trough cutting in. Fins are on the order of 1mm thick and spaced evenly at 2mm. The plastic frame keeps the fan off of the fins. The fan still attaches to the fins however.

Side A:
The base plate on the heatsink is a little different from what you normally see on a typical extrusion cooler. Rather than keep the thickness consistent across the entire width it tends to slope up at the sides. At the central region, directly over the core thickness sits at 7mm. The base is undercut 1mm.

Side B:
The scalloped fins are only on the outside of the heatsink and would appear to be for grip rather than improved cooling. The four cross cuts allow some air to exit out through the side but do not seem to be instrumental to any large degree.