Depends on the fining agent, I believe. Some strip more out than others, I am told, with filtering stripping the most. I think gelatin and Biofine Clear work good and don't seem to drop the flavor significantly. The Biofine is silicic acid or something like that, so it pulls out the chill haze causing proteins, too, so maybe it affects the taste more than gelatin. I
Like gelatin because it works in a couple days and I can put it into the serving keg and not have to rack further or remember to add it prior to racking...YMMV, of course.