Depending on which panel you are coming from, there would be a variety of benefits. This thread offers a comparison between the GC3 and the IQ Panel 2+.
Bullet points:
- Alarm.com video on the panel
- On screen doorbell video calls
- MyQ garage control via the panel
- Advanced Z-wave diagnostics and network mapping
- Power G sensor compatibility (Power G benefits are many, from frequency hopping spread spectrum RF to encryption to extreme range 4-6 times that of standard sensors.)
- Compatibility with existing legacy sensors. Choose the 345mhz version and reuse the 2GIG sensors.
I would add that generally Qolsys pumps out more frequent firmware and feature updates. 2GIG has made a big improvement by releasing the e-series systems to give encryption options, but that requires swapping out the panel as well, and I would recommend the IQ Panel 2+ if you’re looking to do that.