I tried those but it was actually more complicated, and backing up angry birds after rooting doesnt save your highscores at all. this is what I had to do, but I did get it to work.
1. rooted both phones
2. installed connectbot on both phones (free from appstore)
3. followed the directions here to extract the score files from the old phone
Angry Birds Ultimate Backup Tutorial for all Platforms | AngryBirdsNest
note: connectbot only likes to work when in debugging mode and the usb is plugged in to the pc
4. exited connectbot after extracting all of the highscore and settings files
5. connected as mass storage to copy .lua files from old phone to local hard drive (backup) and to the sd card in the phone (because it wound up saving them to the phones memory instead during extraction
6. turned off mass storage. unplugged old phone. put sd card in new phone. turned on new phone. plugged in usb to new phone.
7. opened connectbot on new phone and used the CAT command as listed in the link above.
found a site that lists some connectbot commands for help
A List of Commands for the Android ConnectBot | Chron.com
I pushed the old Angry Birds score file over so far, turned off connectbot, loaded the game and all of my scores were in there. a bit of a hassle, but it saved me a ton of playing time to have to redo. now Im pushing the other 3 game's files over now. hope this helps someone else.