What is the difference between adapter G1 and adapter G2?

Adapter Box G1:
Dry contact communication between the adapter box G1 and the inverter
One control mode: SG Ready control
No Wi-Fi.
The setting is made manually on the inverter, no APP control.
Adapter Box G2:
RS485 communication with the inverter.
Three control modes: Control via analogue output, control via dry contact, control via SG Ready. Compatible with most heat pumps.
Integrated Wi-Fi module.
Monitor your account to manage remote control and monitoring from the APP.