The General forum is where users can discuss any topic regarding Motorola communications equipment - hardware, software, etc. There are also several focused forums on this board, so please take the time to ensure that your questions doesn't fall into one of those categories before posting here!
The last letter denotes a revision. As long as the numbers etc are the same, its the same thing. Either the product has been updated, produced in a differnent year or whatever. Same thing, just newer.