Reason for Ban: Using 'insulting words' that included a 'reference to Patrice Evra's colour'.
"Mr Suárez used insulting words towards Mr Evra during the match contrary to FA Rule E3(1); the insulting words used by Mr Suárez included a reference to Mr Evra's colour within the meaning of Rule E3(2);
Punishment: 40k fine and 8 game ban
Reason for ban: Two counts of violent conduct in relation to the Queens Park Rangers game against Manchester City.
"An independent Regulatory Commission has today [Wednesday 23 May 2012] dealt with two charges of violent conduct against Joey Barton, arising from the game against Manchester City, resulting in an eight-match suspension and £75,000 fine for the Queens Park Rangers midfielder".
Punishment: 75k fine and 12 game ban
Given the fact Barton was punished more harshly, it could be argued that the FA deems violent conduct to be more severe than racial abuse. Of course, Suarez was neither accused or convicted of racism, but reading between the lines of the FA's phrasing ('insulting words that included a reference to colour'), it's clear that Suarez was banned for what the FA deem to be a form of racial abuse.
Who was treated harsher: Suarez or Barton? Did the QPR midfielder deserve a bigger ban than Suarez?