In my experience the contrast for navigation is worse. Unless I'm getting some separate A/B test or something, I don't see how you could argue it's better.
The background is essentially the same brightness as before, but roads are MUCH MUCH darker. And the nav is slightly darker. The route has less contrast with the roads around it and I've had a really hard time deciphering this on a dashboard/in sunlight. I really hope I'm just in some shitty A/B test or something.
Hopefully you're right that it's AB testing, though not sure how they'd gauge your approval/disapproval of colour scheme.
Going back to what I said earlier after further use - better contrast for the suggested route in daytime navigation, however, the nighttime colour scheme has worse contrast than before.