These consoles will be 11 years old in less than four months and it's more than fair to compare them. Xbox One bit the dust back in late 2020, and PS4 will likely be discontinued this year or next.
PS4 is the second best-selling PlayStation console ever (it could be surpassed by PS5, but will likely stay ahead by a few million), and Xbox One looks to hold on to its title of second best-selling Xbox ever given a successor to the Series X/S is already in development and the Xbox brand is hurting.
You can feel free to make your ultimate selection based on any factors you desire. If you want to break down which you prefer about each console, you can do that as well.
You can also feel free to compare PS4 Pro vs. Xbox One X, or even the standard and slimline models.
Lifetime Sales Predictions
Switch: 161 million (was 73 million, then 96 million, then 113 million, then 125 million, then 144 million, then 151 million, then 156 million)
PS5: 115 million (was 105 million) Xbox Series S/X: 48 million (was 60 million, then 67 million, then 57 million)
PS4: 120 mil (was 100 then 130 million, then 122 million) Xbox One: 51 mil (was 50 then 55 mil)
3DS: 75.5 mil (was 73, then 77 million)
"Let go your earthly tether, enter the void, empty and become wind." - Guru Laghima