The PS4, for a long time, was tracking ahead of the PS2.
PS5 is falling behind the PS4 because they can't ship enough of them. The demand is clearly there for more sales, but that demand can't be met. XSX selling faster than the 360 is only faster than the 360, which is slower than both the PS4 and PS5.
Back in Feb, Amphere had the following data (millions): XSXS 2.8, PS5 4.2.
Now, for the period ending in September, they have: XSXS 6.7, PS5 12.8. An increase of 3.9 and 8.6 million respectively.
Clearly, the PS5 is selling better.
Yes I have just seen Amphere numbers, that's interesting.