You will still only hear it in its given position.
Stereo sample would be heard around parts of spectrum depending how wide would you set it up.
So in a sense yes, you are right. You can have artificial stereo output but it’s not real stereo till that single sound spreads across spectrum at each given time it sounds… ugh my English is not good enough to explain this in proper words haha.
The difference is that Heat is a stereo processor. One that you can use to a subtle degree. When you process mono sample that is set at center of PAN through heat, even at very small and hard to pick up distortion it will have two phases instead of one.
To me they are complimentary and fit possible “modular” approach of Elektron as some people are suggesting.
By no means necessary to have them both. I better state that clear haha