I'm planning to buy a new cell phone with GPS, but I'm not sure which one to choose. Should I choose a Symbian or a Windows one?

Is there a processor difference between those two? Which one is more powerful?

If I choose a Symbian will it go slower in finding the GPS satellite and the map appearance?

I'm circling around 3 Nokia cell phones.

Nokia 6210 Navigator

Nokia N95

Nokia N96

Any recommendations?