From their FAQ: > Overture is a data-centric map project, not a community of individual map editors. Therefore, Overture is intended to be complementary to OSM

From their FAQ: > Overture is a data-centric map project, not a community of individual map editors. Therefore, Overture is intended to be complementary to OSM. We combine OSM with other sources to produce new open map data sets. Overture data will be available for use by the OpenStreetMap community under compatible open data licenses. Overture members are encouraged to contribute to OSM directly. It sounds to me like this Foundation wants to be less of an "open Wiki" for data and more of a QA/QC "task force" for OSM data: both contributing known good data back to OSM and trying to curate the best of OSM data back out. Also, it sounds like there's an AR/3D spatial data focus here that goes beyond what OSM currently maps. Though everything is still vaguely worded and lacking examples, so who knows.