Lite Trail G Line is a similar size and construction to the reflective guyline in question.... so I think my experience with G Line might translate.
I tried using G Line as a tarp continuous ridgeline. My prussics gripped the sheath of the G Line very well, but the sheath was not as strong as the spectra core. The sheath ripped and exposed the nice spectra underneath.
I have since gone back to using Lash It for my ridgeline, but continue to use G Line for my tarp guylines.