There's a big difference between Mars probing & road cruising. The Mars Rover mission is to find places to drill & collect rock samples. When you drive on earth, you don't look for places to drill & collect samples. That job is reserved for special grp of people studying the earth crust.
By "more" I meant maybe GOSY has more useful features that can be integrated into autonomous vs NASA, eg. chat, navi, trak, scheduler, etc.
With the NASA collaboration, I guess Nissan is waiting to tell the world they have space tech in their cars. LOL!! *Space Tech Inside*