PS5. Probably by a wide margin (5 million+).
Not questioning your choice, which is reasonable. But, based on the very specific and very wide margin you decided to add to it, what are your predictions for PS5 and Switch sales for the year? For a gap of over 5 million between the two, it looks like you're expecting 19-20 million for PS5 (better than any PS4 year), and/or a total crash of Switch sales despite Nintendo still having big software releases coming, no successor hinted at (not so much as a codename) and Nintendo announcing an increase in Switch production this year.