The Channel News Asia article New Zealand launches into space race with 3D-printed rocket says:
Ships and planes need re-routing every time a rocket is launched, which limits opportunities in crowded U.S. skies, but New Zealand, a country of 4 million people in the South Pacific, has only Antarctica to its south. The country is also well-positioned to send satellites bound for a north-to-south orbit around the poles.
I'm curious if there is a significant distinction or difference between launching a polar orbit mission south from New Zealand versus launching it north. Is it only a question of the area of overflight, or are there differences in the spaceflight dynamics or payload weight limits for example?
Here "polar orbit" includes of course sun-synchronous LEO orbits and is not limited to exactly 90 degrees inclination.