I use comaps, I feel like OSM isnt as good at cars as google maps, but it beats google maps easily in bikes and pedestrian traffic, like one time i plotted out a route where i could sit on a bench (which are shown on map) every 5 minutes or so on comaps. on trains its kind of a wash in comparison to google maps. the biggest issue is when you want to do a spur of the moment thing like 'eat at a nondescript restaurant closest to me', openstreetmap data here isnt great and the built in search engine for a nondescript restaurant isnt great, you cant write 'closest vietnamese restaurant' into the searchbar.

also one time i fell off a cliff and had no signal while hiking and comaps got me reoriented and on the right path in a no cell service area. if i used google maps it wouldnt have had the hikers trail i found on comaps either.