Wii>PS4 at 28 months, PS4>Wii Lifetime.
Wii was good for what, 4 years. PS4 should be around for at least 6 before PS5 drops and even then it will keep selling

Wii because it actually sold in Japan.

PS4, its competition is to weak to stop it from doing so.

The multiP and 1stparty line ups are to awesome for 2015.

No way, the Wii was a one hit wonder and reach an audiency that now is on mobile devices. It was insanely "hot" from 2007 to 2009.

In the long run however, I expect PS4 to outsell the Wii.

I voted Wii.

PS4 is a outdated generic costum amd gaming-pc.

Wii was also outdated, but a unique toy.

Wii had no smartphones, tablets and soon Steam machines/box.

The PS4 won't peak as high as the Wii, but it will sell for a longer time and eventually outsell it. So, the Wii will be ahead in the time frame you're asking about.

The only question you asked was "Who wins?"

I gave you my answer from what I interpreted from the very vague question =P

The PS4 won't match Wii's second and third year so that's why I voted for the Wii.

This. PS4 will easily outleg Wii

What Wii did was outstanding, and I doubt Ps4 can match it. I would be very surprised if it manages to ship such amount, but I sincerely doubt it. So I vote Wii.