The 3.2 Emu is a complete Apple IIe system with a 3.2 inch LCD screen. Runs floppy or hard disk images from a micro SD card and connects to a USB keyboard.
The SoftSP card is an add-on to the wDrive, and allows you to boot hard disk images (2mg and hdv) on an Apple II+ or IIe, which do not have SmartPort support. The SoftSP card is not needed on the Apple IIc or Apple IIGS.
The 1.6 Emu is a complete Apple IIe system with a 1.6 inch LCD screen. Runs floppy or hard disk images from a micro SD card and connects to a USB keyboard.
The A2io is a receiver that connects your Apple II (via your mobile device) to a wireless controller such as the PS4, Xbox, Apple Pencil, or Galaxy S-Pen.