You are right.

So you only want to compare what you want? ok. your choice. Still, this thread is out of what you say interest you and is fair, so I ask again, what are you doing here?

And would you guess the reason Nintendo support their console for a shorter time is because it sustain its sale for less time?

Every day that goes bye, i'm more inclined to say PS4. I wish I could say Switch because I prefer the first party support, but PS4 is a beast. Still, I hope both cross 100M and make moolah for the companies.

This thread is not "out of what" interests me. It's comparing two consoles that are three years apart and from different gens. That interests me because I feel it's wrong. I voiced my opinion stating as much, you disagreed, decided to voice your opinion... and now we're running in circles for absolutely no reason at all, accomplishing nothing.

Maybe, but it becomes a chicken and egg situation.  If you look at the Gamecube vs PS2 or the Wii U it's obvious that sales were the main factor.  But with the Wii vs PS3, it's not that clear.  Wii sales obviously slowed down quicker, but it's a chicken and egg kind of situation.  What were Nintendo's major releases past 2010?  Skyward Sword was the only legitimate system seller.  Aside from that, you had Kirby Return to Dreamland (and I love Kirby but it's not a system seller), and Xenoblade which was not even supposed to be released in the west.  2012's biggest release was Mario Party 9 followed by Rythm heaven. 

If Nintendo kept releasing major games, and kept up advertising, I'd imagine they could have kept Wii sales at above 10 million for 2012.  But, there are reasons they might prefer to simply release  new console.  I could go into it, but basically they just have a different business model.

To be fair I just said "more inclined", it's not my definitive answer. On past topics I've said the Switch will beat PS4, but now I'm thinking that i'm underestimating the PS4. 

My answer is still not clear, just like 8 days ago. 

The problem is that the markets you are comparing aren't even remotely comparable. Japan's console video game market is tiny compared to Europe. That's why the PS4's under-performance in Japan doesn't matter nearly as much as Nintendo's under-performance (thus far) in Europe. I agree with the previous poster who says that the Switch's lifetime sales passing PS4 will depend heavily on if they can get a grasp of the European market, as thus far that's why the PS4 has paced ahead.

What are handheld sales like in Europe compared to other regions? And is the Switch tracking more like a console in Europe, or a handheld?

The problem is that you are saying it has to sell well in one market because Sony does well in that market. Again, if you look at Sony's Japan numbers, they are awful, so they need to do well in Europe if the system is to sell well. Nintendo doesn't have this because it dominates Japan and does well in the US. Again, Nintendo isn't doing bad in Europe and I think this is the misconception people are making. Europe's importance is being overemphasized because Sony does really well there. Nintendo will easily have a 15-25 million gain over Sony from Japan alone. If you look at it holistically, then you'd see that Nintendo progress in other regions more than makes up for a perceived lacking in Europe. 

The Switch with 25M gain on the PS4 in Japan? So you think it will sell more than the DS?