yes, sil doors perform alot better i feel. the doors for the dark grey sil tarps are made of the exact same dark grey sil as the tarp.
the doors for the spinn ul are made of sil in a matching light grey color. i'll have to get more tarp pics up, the sil doors for the spinn ul tarps are an almost perfect color match, i got really lucky there. the only pic of the spinn is if you look at the tarp comparison photo, the one with 3 sizes stacked. the top one is the spin ul, although in reality it's a bit lighter in color than it appears since in the pic it's got 2 tarps under it making it look darker than it is. it's the exact same color as the oes spinn ul and thru-hiker spintex.