FTPie and MultCloud solve a similar problem — managing files across multiple cloud services and servers — but they do it in completely different ways. MultCloud is a web service that runs in your browser. FTPie is a desktop application that runs on your Windows machine. That single difference shapes everything about how each tool works, what it costs, and who it's best for.
This isn't really a "which is better" comparison. It's more about understanding which approach fits your situation.