It's important to be specific when talking about "North" and "South." The differences in physical features depend heavily on which regions you're comparing. For instance, are you comparing:

* The Northern and Southern hemispheres of the Earth?

* The Northern and Southern United States?

* The Northern and Southern parts of a specific continent?

Let me know which regions you're interested in, and I can give you a more detailed comparison of their physical features.

Here are some general examples to illustrate the differences:

Northern vs. Southern Hemispheres:

* Climate: The Northern Hemisphere is generally colder due to its larger landmass and the tilt of the Earth's axis. The Southern Hemisphere is mostly covered by water, leading to a milder climate.

* Landforms: The Northern Hemisphere boasts larger mountain ranges like the Himalayas and the Alps. The Southern Hemisphere is dominated by the vast Southern Ocean.

* Biodiversity: The Northern Hemisphere has a wider variety of plant and animal life due to its larger landmass and more diverse environments. The Southern Hemisphere has unique species adapted to its unique ecosystems.

Northern vs. Southern United States:

* Topography: The Northern US features the Great Lakes region, Appalachian Mountains, and vast plains. The Southern US includes the Mississippi River Delta, the Gulf Coast, and the Appalachian foothills.

* Climate: The North experiences harsher winters and colder temperatures overall. The South is generally warmer and experiences more humid summers.

* Vegetation: The North has vast deciduous forests and evergreen trees. The South features a variety of vegetation, including forests, swamps, and grasslands.

Remember: These are just general comparisons. The specific physical features of any region will vary depending on its location and other factors. Please provide more context so I can give you a more accurate answer.