Note that carto.tchoo does not provide real position in real-time: it only has access to departures, stops, delays and suppressions and interpolate position based on this.

This means that if your train is running at half-speed or stopped but does not result in an official delay, the position will not match reality.

The title matters a lot. Without "real-time" this submission has likely gotten the same lack of attention.

Is the interesting part the upvotes, meaning there's more people interested in UK train networks than French ones ? And it's a comment on demographics ?

Or is the interesting part that the UK one is real-time, and the French one isn't (or at least, zooming in, I don't see them moving).

And to see the status (Ile-de-France only): https://ratpstatus.fr/trains.html

That's no surprise. The French equivalent of anything rail related is always more complete than the UK.