Test has been done many times.. Two observations
The Best were Scotts and Angle Soft, though for reasons I do not wish to discuss I no longer buy Angle Soft...
I'm currently using Prince & Spring.. Which I get in bluk from www.boxed.com
Nice, Soft, Effective, have not had any issues.
The other observation.. Even the worst in the test (RV Toilet sandpaper or Quilted Charmin) By the time I get my pants up, Zipped, belted and so on and go outside and pull the handle.. they are breaking down (5 minutes)