You can do it a few ways. Upload them to a shared cloud account, email them to him (attached to a mail), add them to text messages sent to him. All of these will work, but it will take a while to do the moving.
Now you can, if you have access to a computer, connect your phone to the computer via USB cord and then access the phone's storage through a folder on the computer. Copy the files/photos to an empty folder on the computer and then disconnect your phone from the computer.
Now connect his phone to the computer and do the same but in reverse. Moving the files over to the right folder on this phone. This is the fastest way.
Oh, btw, having the same phone wouldn't make a difference. This would work on any phone that has enough storage space and can read the files.