Would Using My Space Heater in the bedroom for one bedroom Apartment at night Result In A Cheaper Electric Bill Than the Wall Heater?

If you turn the wall heater off or down like to 55 and the bedroom is small and you keep the door closed and if you keep the bedroom about 60 to 65 degrees, yes. Space heaters are not dangerous if used properly. Keep them away from blankets or anything flammable. Two feet clear all around would be considered a safe zone. I keep mine on a table about two feet off the floor and facing the bed, it is set on 60 degrees and works great. I also have an extra blanket on the bed. The only way to save money and lower your electric bill is to turn down the thermostat and improvise and find other ways to keep warm, like more blankets at night and long sleeve sweaters during the day.