A simple breakdown:
Switch sold most units @ 299$
PS4 had the most revenue @ 299, 399 and a 449 SKUs
3% difference in revenue between #1 and #3 We know PS4 is first, Switch could be anywhere from the slimmest of margins up to 3% away from that.
I think there's a good chance it's quite a bit more than 10-20k units (sounds like wishful thinking from some) difference between the PS4 and Switch unless the Pro and MH bundle tanked, which we know they didnt.