What are the differences between Nexxus and Global Entry programs for expedited border crossing?

Nexxus and Global Entry are both programs that offer expedited border crossing, but they have some key differences. Nexxus is a program between the United States and Canada, while Global Entry is for travelers entering the United States from other countries. Nexxus allows for expedited processing at land, air, and marine ports of entry between the US and Canada, while Global Entry is specifically for air travel. Additionally, Global Entry includes TSA PreCheck benefits for domestic flights within the US, while Nexxus does not.