I do things like this by looking at a corner, doing a 360 degree turn, and measuring the distance the mouse had to move. Then go into the second game and tweak things until they are the same.
If you first turn down dpi of the mouse to something that's a lot lower than what you actually play with, it's easy to get pretty excellent results with this ghetto method. After measuring you turn the dpi back up again, and everything will be perfect.
If you want it super exact, you can go search through the config files of the various games and look for the sensitivity number it saves. You can then deduce a formula for translation with that 360 degree turn measuring stuff. It will be a most excellent result because you can put the sensitivity in the games super low to make the 360 degree turn something that needs your whole table.