Well, it depends. DriDown does NOT mean it will not pick up water. And, we know that DWR finishes always leak. The stripes are also better at abrasion resistance. But, if you are careful with your gear and never let it get wet, what is the difference? However, if you use a small 6×8 tarp through heavy rainstorms, and things get wet from mist and spindrift, well, yes, it makes sense to have as much protection as possible. About even with a choice.
My choice was to use a larger tarp for better coverage, then not use stripes on my quilt nor a bivy. A larger tarp is lighter than a small tarp and a bivy, anyway.