Don't know much about the other coins but I think I have every 1:1 cursed coin released. Here a comparison pic.
The MRs are metal and run between $10 and $15
The Disney World coins are also metal and cost $5
The Disney Store coins are made of plastic and were really cheap (forget the price though)
The Checkers are metal and came in the $25 game set (so, 32 coins for that price)
IMO, the checkers are the best value. They need repainting but their really detail and end up costing less than $1 each.
The Disney Store coins are nice too. They may be plastic, but weathered up it's impossible to tell without handling them.
I don't care for the Disney World or MR coins too much. They're the most expensive and the least detailed...