Well if you don't count the Virtual Boy AND combine the GB and GBC, then sure. 

Take two identical consoles with the exact same games on them. One says PlayStation on it and the other says Nintendo on it. I would put my money on the PlayStation one selling the best. I just think the PS brand has more mass appeal. Not shitting on Nintendo in any way here, its just what I believe.

I agree. The only "consoles" that have been consistent for Nintendo are their handhelds. That's why I'm saying the success of the Switch is both a blessing and a curse as it looks like Nintendo as it seems like they are now stuck in that market. Which isn't really a bad thing, especially now that they have a monopoly position but I do wonder if they will and should ever release a traditional console.

GB and GBC are combined by Nintendo themselves you can look it up on their investors site yourself if you want GBC is classed as a pro model of the GB Virtual boy is also not a portable it's a table top console.

Edit: Two identical platforms argument is a flawed argument as both companies utilize different approaches to sell like how Nintendo sells on its first party you also put a vague scenario with limiting factors as lets change the context two identical platforms that are hybrids and have identical third party but their own first party I'd say that scenario is in Nintendo's favour.

Cool. Nintendo fucking owns the table top console market. No one is even close!

What I learned in the 12+ years I am on VGC: Specs don't sell systems. Perceived value, games, fun does. Will the introduction of PS5 and Scarlett reduce the perceived value of Switch? Barely with it's specs. It will only reduce the Switchs viability, if games arrive that blow everything before away. Experience says, that companies seldomly have that available at launch. Only in year two or three of the next gen we will see games utilize new possibilities in a meaningful way. By then the Switch will be past 80M, probably even 100M.

I might change my opinion, if the new consoles have a really mindblowing game ready for the launch or shortly thereafter. Not a visually polished version of games we already had.

The really funny thing is, that Switch had exactly that with Breath of the Wild, which even more drives home the point that specs barely matter. Switch despite lower specs could offer an experience PS5 and Xbox One couldn't. If something like that drops, it could make Switch look dated. But just new visuals on the next Battlefield will do nothing.

Um... Xbox 360 versions of games outsold PS3 just last generation pretty consistently... so even just 5/6 years ago it wasn't the "best brand" for 3rd party games... PS3 was bailed out at the end of the generation because Microsoft punted and lost a lot of it's player base and that is how it was able to hit that 80+ million mark...

As for those games on Nintendo hardware, they are usually shells of the other console versions so they don't sell on Nintendo consoles very well, if they were full fledged versions of the game though I bet they would sell just as well, if not better (look at how games like Mario Kart, Mario Odyssey, and Breath of the Wild are still consistently top selling games 2 YEARS after release).

The specs and release timing are a concern, don't get me wrong. But here is the curse: Nintendo's arrogance. The Wii U failed big time because Nintendo assumed the Wii name and the tablet alone were enough to sells tens of millions, if not a hundred million units. I think hybrid systems are the way to go for Nintendo in the future. I imagine they'll use the Switch name again for its successor. Call It Switch 2, Switch Evolved, whatever. Now imagine they don't promote the console properly, and the price is too high. Not to mention trickling out exclusives people want to play, rather than at a good pace. It would be the Wii U situation all over again. The only time Nintendo has had two home consoles in a row that crushed the competition were the NES and SNES. The Wii was a fluke in otherwise declining console sales, and the Switch is another fluke (in part due to it being a hybrid). Nintendo has a very turbulent history in hardware success.
I'm hoping that the Switch 2 has almost none of the issues Switch has had. I want something better than the Switch already is, not worse.

The fact that GTAIV sold more on the 360 surprise me. Im not sure why you don't believe the PS3 sold 80M though. Could be there were just a more diverse audience on the PS3.

I changed my statement to further clarify what I meant about the PS3 sales, it sold a lot at the end of it's life and I feel that was because Microsoft pissed a lot of their player base off with how they handled the Xbox One and it's announcement.  Still have a hard time believing those 80 million units saw full "use" in the generation if that makes sense.

Nintendo really just dropped out of the console market but didn't tell anyone. The Switch might hit close to 50 mill units by the time the holidays end. With that installed base...I sincerely doubt many 3rd parties won't attempt bringing games to it (cutbacks and all). Nintendo is in a really good place right now.