Electric and tealight warmers can both work well with wax melts. Electric models suit people who want a switch and no open flame; tealight models suit people who enjoy using a candle beneath the dish. The best choice depends on your space, habits, and the warmer's design.
An electric warmer heats its dish with a bulb or heating element. Check whether it needs an outlet nearby, what replacement bulb it uses if applicable, and whether any timer settings fit how you plan to use it. A timer is a convenience feature, not a reason to ignore the product's instructions.
Electric does not mean cool to the touch. The dish and melted wax still need careful handling, and the warmer belongs on a suitable stable surface with the specified clearance.
A tealight warmer does not require an outlet, but it does require an attended flame. Use the candle size and type specified for that burner. Do not improvise with a larger candle to increase the heat or extend the session.
The category alone will not answer that. Dish shape, heat output, wax amount, and fragrance formula can make one warmer perform differently from another. It is too broad to assume that every tealight model runs hotter or that every electric model makes scent last longer.
If you are choosing your first warmer, begin with the format that fits how you will actually use it. Then evaluate fragrance performance with an appropriate portion of wax instead of trying to compensate for a poor match by overfilling the dish.