Coupe describes a body concept; electric identifies the source of propulsion. A traditional coupe usually has two side doors and a low roof profile, while a battery-electric car uses a rechargeable battery and electric motors. A single car can satisfy both descriptions, so they cannot be treated as mutually exclusive categories.
Start a comparison from the coupe's physical layout: entry, seating, roof clearance, and luggage access. Then identify its powertrain. If the alternative is a four-door EV, some differences come from the body and others from charging and electric driving. Keeping those separate reveals which changes would actually affect your journeys.