Upon Juan's reccomendation and post I tried his suggestions and I think I agree with your findings. EAC is quieter more gentle sounding. DB is more like you are there not muffled slightly. Of course I only experimented with 1 blues acoustic track. I suppose now I can use both programs EAC and DBP and have double the files in my computers!
I also agree that the original file burned  to the PC that has XXH installed is slightly better. But if you burn a file in another computer and cut (not copy) the file and transfer it to the XXH computer it is reallly close to the one burned in the XXH computer. The copied file is not as good because I believe it is not the original file. When you cut it I think you are transferring the original file to the usb drive and than cutting it again into the XXH PC. So if you have files in your other computers I say Cut don't copy. Have your backups be copy's stored on another computer. Always have the originals on your Music PC. I now think I will burn every CD once on my other computers using EAC as my backup and then burn them again on my Music PC using DBP.