No disrespect taken.
The computer's onboard Sound Recorder (accessed through the Start Menu/All Programs/Accessories/Entertainment) will let you open any .wav file and listen to it. That way you can compare them directly.
There's nothing to break, as long as you don't change anything (volume, speed etc). All you'll be doing is listening to them. If you find the one in EAX you like better you can just move it to the DBSM folder. It will ask if you want to replace the one with the other. Click 'Yes' and it's done.
If you're still worried, you can right-click on the file and select 'Rename', and add 'orig' to the end, and the new one won't overwrite it. Another way would be to make a copy of the entire Sound folder, and label it 'Sound2' or 'Sound (orig)', thus having a backup.
You really don't want someone else doing this for you, as you would have to describe each file, and he would have to guess which one you meant, and would possibly guess wrong, and then you'd have to tell him he got it wrong and then he'd say "Do it yourself, then!"
This way you save several steps, and learn something in the process. Remember, every modder started out as someone who knew nothing at all, and started fiddling with it.