Mirror two different devices via usb I am trying to do two demos running on two devices.  The goal would be to plug an external monitor into my computer and have one display show one device, and the other show the other device.

I would use Reflect 2, but it only does wifi, or personal hotspot
I would use quicktime but it only supports one device at a time.

Any ideas?
Yes. It's now quite easy to do so using Quicktime.

Connect both phones to the computer using a USB -> Lightning cable.

Open QuickTime Player.

Choose File -> New Movie Recording twice.



Choose a given phone to mirror for each of the windows.



Move the windows around as you see fit!