MiniDSP 2x4 (HD vs Balanced)? >> LSR 305's

MiniDSP 2x4 HD vs MiniDSP 2x4 Balanced?

What does the HD have to make it so much more expensive than the BAL?

HD has 4 outputs - I believe the unit can easily be programmed to make 2 of them preamp outputs, and 2 of them subwoofer preamps?

The BAL appears to have 4 outputs. Can you do the above on the BAL?

Can the outputs on the BAL be adapted to TRS or XLR at the powered monitors?

Why wouldn’t I run a Topping MX3, or Topping DX3 Pro instead? Just because they don’t have low pass filter etc for subwoofer?

Is there anything like the MiniDSP but with Bluetooth?

Thanks all