According to the DVLA, the vehicle on the left is a car but the one on the right is a light goods vehicle aka a van.
As such the one on the left can be driven in Bath’s Clean Air Zone without being charged but the other one is subject to the charge.
I inadvertently drove 0.11 miles in the CAZ last month & picked up a fine….& before anybody kicks off about polluting Land Rovers, I ride more miles on my pushbike than I drive in the Defender.