LSD, which is better?

Been looking around but can't find much so maybe I can draw upon some you guys experience.

Looking to beef up rear axle with a 31 spline with up coming mods...so that means I'll have to match the LSD. Trying to finalize descision between Ford Racing LOK LSD w/ carbon disc or Eatons' version. Both boast peformance but Eaton charges a cool $240+ over Ford's price making it double. Is this justifiable? Is Eaton really superior where it would warrant a $240+ mark up? Can't find any hard evidence on why. Maybe some of you have stories with these and can shed some opinions. Or even some other alternatives. Any help is greatly appreciated.

Good point!