WISH prioritizes traffic on the internal network.
QoS limites upstream bandwidth on the WAN side.
I've had good and bad results with both.
Just noticed crummy performance with media streaming to a media center extender using W.I.S.H, horrible studdering and blocky compressed garbage video. Only when I DISABLED W.I.S.H did I see acceptable increase in performance. No studdering minor video improvement but nothing to gloat about. It kind of defeats the purpose and for some reason is working in reverse to what it's supposed to do. Oh wellz. FML. I may actually, when everyone goes to bed, downgrade the firmware to 1.11 since everyone seems to say it's the best f/w and test it out along with my other post related to crummy performance wireless>wireless wireless>wired.
Kudos.