One difference ... Binding the v1 was just holding the trainer switch while turning your radio on
While binding the v2 you have to hold your rudder stick far right (or left check manual) while holding the trainer switch while turning your radio on... Lol
Are you following that new procedure for this v2 bird...? That is what causes binding issues..
One thing... If you are having issues of the bird not binding to the transmitter between flights on changing the batteries, that is normal. Even the 130x has that issue. You just have to stick your bird as close to the antenna as you can and retry. Sometimes I have to retry three times by just unplugging the battery of the bird and trying again... Don't have to switch the Tx off every time
If this is mid flight then yes, rebind it using the procedure for v2. Like tony said, you should be perfectly fine binding this one to the old settings. But only one bird will talk to the radio and will be remembered on one setting at one time. If you want to use two birds, you will need two separate model numbers in your Tx.
Let us know.
Fly safe!!

have fun!