* Distance: The most significant factor in how bright a star appears is its distance from Earth. Some stars are simply much farther away than others, even if they are intrinsically very bright.
* Our View: The Earth's tilt and orbit means that different hemispheres have different views of the night sky throughout the year. The Southern Hemisphere has a great view of the Milky Way, which can make it seem "brighter" to some. However, the Milky Way is just a collection of stars that appear dense from our vantage point.
* Light Pollution: Light pollution from cities can significantly affect how many stars you can see, regardless of hemisphere.
So, the brightness of stars is not dependent on your hemisphere.
