It's similar, the main difference is that the FFRR warms the car for the occupants only down to a pre-set ambient, then warms both the engine & cabin, below another pre-set ambient, it warms the engine only. I can't remember the temperatures, I'm sure they'll be on here somewhere.
Originally, the L319 was to have similar functionality (albeit with a different heater and control architecture) but the development overran due to quiescent current drain issues and the system was restricted to engine-only on startup below 5deg. C. There was an aftermarket modification to add a W-Bus controller to fire up the heater when the vehicle was shut down to pre-heat the coolant but not the cabin, later aftermarket iterations got warm air moving in the cabin but initially suffered similar battery issues as LR.
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