Do you mean Overflow ON/OFF instead of Polychain ?
The answer is No, at least not with current HSK Firmware.
If what you want is Single Mode on the Deluxe meaning 16 identical voices, i think the answer is Yes. I need to think more to be sure.
With the Deluxe in Multi Mode the answer is a big NO. You have no way to split the HSK keyboard. You do have an advantage/disadvantage of having two separate set of controls. The Deluxe shares the same controls, and you switch between Up and Lo to connect the controls individually, or press both to control Up and Lo together.
I believe an external MIDI processor would get you close, maybe very close, you need to do MIDI via USB, as you’re likely to be bogged down over DIN MIDI.
I need to think more about all the modes of arp, chord mode, ribbon, etc to consider the differences.
SIDE NOTE: The Deluxe also has Overflow, so i guess it can go beyond 16 voices.