While I do not have a HG tarp, I do have a Superfly and an equivalent Cuben of the same size. Which do I like better? Hard to say. I understand your concern about durability and weight.
I tend to use my Superfly during the Winter when I am pulling a pulk and weight is not as much of an issue or when I car camp. When I bring my dog and expect to pitch low to the ground I will use the superfly.
I use the cuben when I don't have the dog and when I have to carry the tarp on my back and I expect rain.
I know this is not helping you decide but hopefully you will gain some insight on how I use these two tarps and when. If I had to choose only one I would get the cuben.