Same Zwift Segment - Different Strava Profiles

Would anyone be able to explain to me why some (or perhaps it’s all) Zwift segments show different profiles on Strava. Here is an example of ‘La Reine’:

Some show this (which looks correct):

While others show this:

Clearly VERY different. I noted the same thing for AdZ. Is this a ‘smart’ vs. ‘dumb’ trainer thing, or something else?

It could be that the other user had Strava do “Elevation Correction”.


The second one looks like the real world terrain that La Reine is mapped to. So, as Dan said.