and what about pricing?
will the 10 chip board coast like the 20 chip board?
if so, it will be very expensive.
There will be no 10 chip board. Just 20 chip board populated with 10 chips.
It doesn't make sense developing 10 chip board in this narrow time frame.
And 10 chip board probably wouldn't be cheaper - there is very low number of orders for this product expected.
It's wiser developing only one board (can be ordered in greater quantities) and populating it accordingly with 10 or 20 chips.