If you're not gung ho on Koln I don't think you'll be too crazy about Sun Bear.
I'm in the opposite camp: When the Bremen-Lausanne set came out on lp it blew my mind, Koln did me further in, and I'm a huge fan of Jarrett's solo piano concerts. Sun Bear is among the best of the concerts, but if you're bothered by the "singing" or just not that into Koln, skip it.