I bought a package deal from someone that thought they wanted to get into hanging. Finally managed through all the stuff and found three different UCRs. The two I am unsure of are below:

IMG_20191126_072751.jpg

The one on the bottom has a continuous loop that goes to a prusik knot, the top UCR has just cow hitch that leads to the prusik knot. Any reason for the difference between the two?

Thank you!