Oil based is always better than "electric" due to cost of energy. Your best best would be to got to a Home Depot and compare.
Most of the fires are caused by misusing space heaters or using really old ones. For example, if you set up a space heater from the 1950s under lace curtains, you'll probably have a roaring fire soon. Most modern space heaters are very safe if used p...
Personally, i have never used it but i know that my great grandparents, who are big on the air purifiers/space heaters, do. And last time i was over there i leaned up against it and when my great grandfather told me that it was a space heater i freak...