I have followed EDR and FR since 2003 as both companies started life with very similar positions as small development companies with small mines in Mexico and very similar M/Cs..
Since that time the EDR share price has apreciated approx 500% with an all time high of just over 2,000%
During that same period the FR share price has apreciated 3,000% with an all time high of over 6,500%
This difference imo can be summed up in one word: Managment
FRs manangement is second to none and I expect this will continue to show itself in the share price in the future just as it has in the past.