An additional plus for the 11Rack is that's its a cheerful orange color. Sure to brighten and add warmth to any studio
Seriously though. One nice thing is the ability to record both a clean and a effected track simultaneously. The advantage to this over the plug is that it uses 0% of your CPU. And you can always duplicate and reamp the clean track using the rack its self or the plugin. Its fairly easy to create a dense guitar mix without breaking the CPU bank.