The consumption of a thermal vehicle is influenced by many parameters including driving style (strong or soft accelerations), geography (mountain or flat), average speed, weight transported, etc …
The (electric) consumption of an electric vehicle also depends on many parameters.
A VE is less sensitive to mountains because after a phase of high consumption in climb follows a phase of production of electricity in downhill (the electric motor then works as a generator to slow down the vehicle while generating electricity). On the other hand an EV is more sensitive to cold weather, on the one hand because most of the current batteries need to be reheated in cold weather; on the other hand because the electric motor generates very little heat and can not heat the passenger compartment like a thermal engine: the energy of the batteries must be used to heat.
Here are some animations that make it possible to better understand the influence of the main parameters.