No, I'm making a straight comparison between the issue you highlighted in that post. Now you're adding in some additional comment about him being POTUS.
Surely the principle is the same regardless...
Holding arguably the most powerful political seat in the world does make quite a bit of difference.
There is an obvious measure of seriousness (in terms of the public reaction) to allegations like he made, depending on who they come from. Coming from a nobody on twitter? Harmless. Coming from a member or two of the house? The words hold more power, but will be unlikely to get the coverage and reach to make it dangerous.
Coming from the sitting president, and backed (or at best not condemned) by the majority of the replublican party? That's a rather different story.