When will the switch outsell the ps4?

[aris4me]

I was wondering why we say "switch 2 " like it may be a completely different console in terms of sales... and why we won't calculate switch + switch 2 vs ps4 + ps4 pro... Cause all these sales of PS4 are ps4 + ps4 pro (Gen 8 + 8,5 or 9 or I don't know :p )