Reply to Traktor Scratch A10 & Serato SL4. The price difference is ridiculous!

Can anyone enlighten me as to why the SL4 box is SO much more expensive that the A10? They both have the same 4 deck, DVS functions and arguably Traktor has more versatile software, so why the staggering price difference?

The SL4 goes for about $800 AUD
A10 for about $500 AUD

That's $300 difference. Half the price of a Maschine