Station-IC and Agent-IC - What is the difference?

Question:
What is the functional difference between Agent-IC and Station-IC?

Answer:
Agent-IC runs on iOS and Android mobile devices.
Station-IC runs on Windows and MacOS computers.

Agent-IC is optimized for mobile operation.
Station-IC is optimized for multitasking desktops with a scalable user interface and an always-on-top Compact mode that the end-user can assign Favorite keys to.