You mean the nvm file system? Like use QPST to copy all of that stuff over? Might work--I dunno. What I do know is that on Sprint, just changing the ESN + checksum and the MSL SPC will not allow the net connection to work. Don't ask me how I know though
But whatever you do, on both phones make sure you back up anything you mess with via QPST. Keep good, untouched backups of everything so you can restore them in case anything goes wrong.
And please report back here (or on mobile-files) if you have any success. The problems getting the internet to work might be just a Sprint issue here.