Pro Tools 7.4 is a digital audio workstation software that offers advanced recording, editing, and mixing capabilities, making it popular among professional music producers. The Digidesign Mini 2 is an audio interface that provides high-quality audio input and output, designed to work seamlessly with Pro Tools software. In contrast, the Roland VS-880EX is a standalone digital studio that combines multitrack recording with built-in effects and mixing capabilities, catering more to users who prefer an all-in-one solution without the need for a computer. Each option has its unique strengths, depending on the user's workflow and preferences.