Besides the brand? I don’t drive but I know plenty of people who use Waze as the “car gps” but gMaps as the “search engine for places”.

Even if it’s just a GUI, different apps get you different experiences, and if you succeed it’s a bigger % of phone usage. People who mentally treat location searching and navigation as separate tasks (worthy of separate apps) are at risk of leaving for a competitor. So build two tools specific to each use case. It’s the Unix way.

I don’t know if this is the case, but it’s likely there is some left over legal issues to wrt user data.