Every edition can work stright from the USB. You can test all of them and then choose which one you want to install.
The Linux that you will be getting are:
BackBox Linux is an Ubuntu-based distribution developed to perform penetration tests and security assessments.
It is designed to be fast and easy to use. It provides a minimal yet complete desktop environment, thanks to its own software repositories, which are always updated to the latest stable versions of the most often used and best-known ethical hacking tools.
Tails is a live operating system built on Debian that uses Tor for all its internet traffic. Its main goal is to give you security through anonymity. With it, you can browse the web anonymously through encrypted connections.
All your traffic is routed through Tor to hide your physical location or see which sites you visit.
Kali is built on Debian and maintained by Offensive Security Ltd.
With around 300 tools for testing the security of a network, Kali's main focus is on pen testing, which means it's great for poking around for security holds in your own network.