Besides Bluetooth vs Wi-Fi what are the reasons to consider the A1-MR or the A1 over one another?

Both Audioengine Bluetooth and Wi-Fi-based solutions are capable of delivering very high quality audio! Bluetooth is an extremely convenient way to quickly pair to a speaker for easy wireless playback. Wi-Fi solutions are great for multi-room setups with custom groupings with different music or simultaneous playback to all which can be easily controlled with the A1-MR app.