I actually prefer North Los Altos. It's pleasant and downtown and parks are plenty. People are nice and usually leave you alone. (There's nothing wrong with South Los Altos, we just want to avoid the Cupertino schools.)
However, Palo Alto seems to have more affordable properties including the newer townhome communities and usually more inventory than Los Altos.
I feel people in Palo Alto are more standoffish and entitled. Maybe it's the "new money" factor? Not sure.
I am sorry if anyone here is from Palo Alto. I am generalizing from experience but of course, not everyone is the way I have witnessed. And there are really nice people in Palo Alto too.