It seems they consider themselves complimentary with OpenStreetMap, as stated on their FAQ https://overturemaps.org/resources/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.

I don’t know a lot about any of both projects, but it seems fair.

I use it, and combining it with autocorrect and suggestions I find it really easy and fast to use.

I think that hiding readed posts on the front page is a nice idea.

I usually sort by new on my subscribed communities if I see that happens, because normally there are some new posts when I came back to check Lemmy. It seems that if I let it sort by Active or Popular, there are a lot of posts that I’ve already seen that they still have activity.