All three panels are compatible with Surety however the IQ Panel 2+ has been discontinued and the IQ Panel 4 would be the newer generation.
This is one option of doing it. The easier way would be to restore the sensors and user codes via a backup. There is currently a backup on your account from January 26th that can be used to restore the sensors and user codes. The 2GIG EDGE panel will need to be on firmware 1.3+ in order to restore the backup.