All electric heater generate the same amount of heat.
However, the thermostat governing the heater might make a sensible difference. Older mechanical thermostat might increase the heating cost by 15% and sometime much more depending on the characteristic of the enclose area. Furthermore, the comfort is much less generally.
Unit
without FAN also permit a High quality electronic thermostat to make the room much more comfortable by keeping the heat element at a lower "Average temperature". What it means is that the heater is generally warm to the touch -- instead of being scorching hot.
I am in Quebec (where over 73% of the heating is by baseboard heating), so these type of thermostat are available at any hardware store (probably 10 brand of them). Elsewhere in US, I was able to find some of the HONEYWELL TH1xx series.
In any case, read the instruction carefully: You might need to inform the thermostat of the presence of a motorized FAN. Some assume the FAN exist -- and go ON/OFF by default -- these are not as comfortable. Some assume NOFAN -- and go proportional by default -- those will kill a fan motor on short order if you fail to reprogram them.
Actually, Honeywell did purchase a Quebec company call AUBE... You might get almost all model from their line-up under the HONEYWELL brand name -- Visit
Aube Technologies inc. for more information