It's a very smooth, mild, notchy intermittent resistance. Still noticeable, though. And with the key on, you notice a resistance on top of that which is not notchy, but more like a typical drivetrain resistance.
Interesting. If by "smooth" you mean the pulses/bumps of resistance are evenly spaced apart it sounds like you, more or less, have the same sensation I do (obviously we have no direct way to compare strength). But what's interesting is that you have an additional resistance, with the bike on, that is not notchy. I don't have that. That makes me wonder if the notching you're feeling is something unrelated to the motor (bearings, brakes, belt, etc..) and that when you turn it on you are getting resistance from the motor (notchy or not) that is melding with or being masked by the other resistance.
If I remember right your first comment was in line with the other thread you linked to; in that the only real resistance felt was when pushing the bike backwards when it is keyed on. But upon actually testing your bike you found two separate resistances that are present when moving the bike in either direction; a notching sensation similar to what I feel when the bike is off and on and a steady resistance when it is on. Do you feel they make it harder to move than a new ICE bike in neutral?