It would be weird if it didn't outsell, the series S has always been available here in Europe since day 1, the series X has been on amazon UK in stock for over a week now without running out of stock.
On the other hand I haven't seen a PS5 for sale anywhere. Good thing I got mine when I could last year.
If I wanted a series X I would order right now, and I get 20% discount as I dont pay VAT in the channel islands, so it costs me £375 brand new, but I have a powerful PC so.
.