Ernie Ball has just come out with its own line of coated strings, and Ed Friedland has put up sound clips comparing coated Slinkys, conventional nickel Slinkys, Stainless Slinkys and Flatwounds, each with fingerstyle, pick and slap. Granted, it's only one brand, but it's a chance to hear the different types of strings all played on the same bass with the same setting.
http://www.ernieball.com/news/45-1From a thread at the EB/MM forum, all the samples were recorded on a MM Big Al using the middle pickup in passive mode.