IQ and bokeh quality for outdoor portrait? 85f2 vs 70-200 f4 IS

So which lens has better IQ and/or bokeh @ 85mm? I will be using it mainly for outdoor portrait as I think 85mm is too long for indoor.

So anyone own both lenses and what's your opinion?

Edit: Argh i mean 85f1.8...can't change subject now.

85mm is perhaps too long for indoors if you're using it on a crop camera, so I'll assume that is what you're using. The 85 would certainly make more sense as a portrait lens, but the 70-200 is not slouch either, it produces very nice backgrounds wide open, and it's pretty sharp at any aperture.

Here's what a portrait would look like at 93mm, it's a pretty old shot since I haven't been using the 70-200 for portraits much.