IMO, the only real use for CGP or CGL is the ability to scan for fault codes related to Body (B), Chassis (C), and Network (U) due to the horrible GUI. All of the other apps out there only scan fault codes for Powertrain (P). Just like the other day when I had my Service Stabilitrak light illuminated on my dash, TorquePro said no faults found, but CGP showed that I had a U1026 code which was a network/communication issue between the PCM and TCCM.
If the CGL gives you the ability to scan P, B, C, and U fault codes then I would stick with the lite version. The GUI on CGP/CGL is no comparison to the Torque app.