On a Wilson/ Nowlin cut both the upper and lower cut are cut square or flat on the Para /Clark cut the lower cut is a radius cut. Many feel the radius cut is stronger. Also keep in mind the Clark and the Para are two different cuts. The radius for the Para cut is set back farther than the Clark cut. The Para Clark cut Ramp failures are almost ... More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.