Most of the long ester test I've used from UGLs have been pretty comparable to the HG test I've used. The only noticeable difference I've seen is HG Prop which had zero pip. Prop seems to be hit or miss from my experience with UGLs as far as pip goes. If I could afford to use only HG gear I would but its not always feasible. I use a pretty good UGL source that I trust and has outstanding gear.