https://www.google.com/maps/@39.9561738,-86.1623079,150a,35y... is a "standard" two lane roundabout. Roundabouts like https://www.google.com/maps/place/Minneapolis,+MN/@44.883386... are more similar to a turbo roundabout but does not force traffic out after 3 exits or less, the inner lane could be followed indefinitely.
On that second link, I don't see any roundabout at all. It looks like a regular intersection to me.
Maybe the aerial imagery is out of date? It looks like a regular intersection on the satellite view, but Google Maps has it marked as a roundabout.
This is interesting, I seem to be getting newer aerial imagery than either of you https://i.imgur.com/tC6fsQm.jpg
If you switch to globe view, the image changes.
Yep that's it, globe view has the newer image and legacy mode has the older image.
Took me a second look to see it, look at the diagram in the Wiki link. The inside lane physically becomes the outside lane at two points, meaning you don't have to cross a lane to exit like you would sometimes need to in a "normal" two-lane roundabout.
The first few times I encountered a two lane roundabout, I had some concerns about whether you had to cut across lanes to exit in some cases (especially when going straight across the roundabout). But after using it a bit, it's clear that it works pretty well, and that it's no worse than a 1 lane roundabout.