Huge differences in other aspects beside night operations.
How are scene responses handles if they are allowed at all?
Are all flights inter-facility?
Some countries do not allown VFR night operations. Some countries do not even allow civil night operations at all.
I watched a response in Wyoming several years ago. The helicopter and the ambulance both departed at the same time. I asked about this and the guy told me that since the distances are so far, and weather reporting so scarce, that the helicopter launches and if he can not make it to the scene (possibly 75 or 100 miles away) the ambulance is already enroute. If the helicopter makes the patient pick-up, the ambulance turns around and goes home. This is one scenario you won't have in Europe.
Canadians might have some very long legs, what is the Canadian scene response like? Do Canadians do scene responses or are they mainly inter-facility? Remember, Canadian health care is socailized. Non-profit and they surely do not launch for cases that are not worthy of helicopter transport.