I believe Scott's 1000 tested near the top and Angle Soft tested in the lower half last year at Quartzite. Hence, I thought I would try Scott's. Since the 16-pack was the best price at the time I bought it to split between the MH and house.
I find Scott's to be non-absorbent, rough (hard) and single ply which are all negatives for me. Angle Soft, on the other hand, is two-ply, softer and more absorbent in my opinion. Therefore, I threw the unused Scott's away and bought some Angle Soft.
When I wand my black tank, usually after setting for a period of time, I find a lot of TP "shards" are discharged during the process, more then I would have imagined. Since I travel solo this infers to me that Angle Soft may not completely break down without lots of motion and agitation from moving the MH often. However, since my MH does not have internal black tank sensors, and I do wand the tank periodically, I am not concerned about a long term build-up. Frankly, the tank bottom is easy to view and is still clean and white after wanding.
So, while I don't know if another TP brand would leave the same volume of shards on the bottom with my style of MH use, I'll do understand how to maintain a full-flowing tank while using Angle Soft. And, since the price is right, as is the comfort factor for me, I'll continue using it.
As an aside, this past week I put one Great Value "Flushable Wipes" in a glass of water and left it for 24 hours to see if it would break down. It didn't. It simply turned into a soggy wad of "cotton-like" material which was even difficult to tear. Perhaps the next "Scientific TP Survey" should also test some brands of flushable wipes.