And, of course, both cities benefit from Mexico’s super-easy residency.
Mazatlán, however, tends to be more humid than PV, so it won’t feel much different.
But, since expats almost never live there, I don’t think it’s fair to include those areas in a cost analysis.
Both cities can be very walkable if you settle in the right place—many expats live without a car.
Also, the hills around Puerto Vallarta (and heading south) are thick, green, and lush, while the area surrounding Mazatlán is dry and brown during much of the winter high season.
Weather: High temperatures are somewhat higher in Puerto Vallarta than in Mazatlán.