Yep, they all produce the same amount of heat from the same amount of power.
The difference is how the heat is delivered. Conductive heat, like from a stove top, is best if you are in direct contact like a pan on a stove top. Most of us don't snuggle up to a stove.
So Convection (even with forced air) is normally moving the air past the heating element, and then you get heated from the air.
There is also radiant heating, like infrared heaters use. Yes, they warm up, but you sense the heat more directly without heating the air between you and the heater as much. This is what 'heat lamps' are.
The latest rage are 'heat pumps', where you use the energy to get, say a SEER of 10, is supposedly efficient enough to 'collect' 10 watts of heat for every 1 watt it uses, and allows you to re-deposit the heat elsewhere. ... This is basically a refrigerated HVAC unit in reverse. ... This is also why 'heat pump' water heaters cool the room where they are located. So if you use them, putting heat pump water heaters in your conditioned space makes sense to me (but that could be argued differently too).
I hope that helps.
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