[sdiy] Polysynths: 8 voice or 16 voice?

[cheater cheater]

Let's say you're making/buying a polysynth. You can make it 8 or 16
voice. It's equally practical to do 8 or 16, it's not larger or
bulkier, the 16 voice costs 25% more, it doesn't do multitimbrality,
so there's only one sound coming out of it at any time. What do you
choose, and why?

What markup would 16 voice have to be over 8 voice where you'll say
it's not worth it anymore? Ranging between 0% and 100%.

Thanks!