It's very easy to patch the terminal.exe program to change the DDE server name from MT4 to something else. Obviously it can only be a 3 character string.
I've done it and it has the desired effect.

I won't post here how to do it as it almost certainly breaks the terms of use of the program.

If people want the facility in the program to change the DDE server name then make a suggestion on the metaquotes site in the program suggestions page and maybe if enough people request it they will do it.

I dont think comparing different price feed helps with trading. It does show who the more buckety bucket shops are (those with furthest price shifts away from the market).