The densities are approx. as follows :Light 50/5%, Medium 60/5%, medium to heavy 70/5% ,Heavy 80/90% . The pics show a guy with hair which is no more than medium [on a system] so, as SP9 wants to emulate that style, to my eye/mind 70% would be going too heavy...he could go 60/65% just for `safety`....that`s what he`ll get with a stock anyway..they are all medium density. The difference between stock/custom is, usually, custom is a better fit....you may have to trim/cut a stock to get a better fit ..they are all `freestyle`too ... which is easy to `play around`with style-wise, so yes you could train the hair into that style easy enough.... the perimeter of a stock , can be uneven or inclined to bunch-up in places due to the contours of your head being different to the shape/curve of the base.... they`re fine material-wise etc and many guys can get a perfect fit with them ,but many others will not and custom, for them, is the best fit. Regards, Paul.