Is nintendo the winner of the 8th gen or the 9th gen?

[Louie]

The thing is, with generational lines blurring the way they are we are always going to have these discussions because declaring a "winner" is not so clear-cut.

Overall, the picture looks like this: About 2/3 of the time Nintendo is market leader and around 1/3 of the time Sony is.

Who's selling the most consoles depends on which point of the product lifecycle a company's console is at, though. Consoles usually start slow, then peak and then decline again. So it's always fluctuating. Things have changed a lot since the PS2 and DS days when a winner could easily be declared.