I am pretty sure any smartphone you buy is going to come with GPS >Standard. I don't know if one is better than the other unless you look at a low grade compared to a higher up cell. Any $99. (deal) the phone will have a decent GPS. The only difference would be ease of use, say . Both good advantages to iPhone is you can talk to "Siri" which would make it a bit easier driving (dash mount of course) But Android has Google now which has been around as long as Siri also has voice command. Don't get stuck buying a HIGH price phone because salesman says its got a better GPS. Don't
drive while setting up anything or texting while driving through.