Here is easy way to understand what the four Trusted Traveler programs do – Source: Comparison Chart | Homeland Security
There are 4 special programs offered by the Dept. of Homeland Security to help travelers speed through the lines when they go through the security checkpoint at airports or when re-entering the country. The TSA PreCheck program is the most used program to help travelers have expedited screening at airports. The Global Entry pass allows for expedited processing upon arrival in the U.S. when traveling abroad. CLICK HERE to see an easy chart that compares all the programs and their costs. P.S. If you travel internationally the Global Entry pass is a must. The Global Entry pass also includes all the benefits of TSA PreCheck for only $15 more for the 5 year membership. Via Executive Travel.