They're not the same size though. Someone uploaded some pictures earlier, and the Switch's screen alone is almost the size of the entire Vita. It's not like he's calling the thing massive either, i think "a bit" is will within the range of allowance for preference :p 

Switch (console only, without joycons) :
23.9 cm (width) by 10.2 cm (height)
(9.41 in × 4.02 in)
= 243.78 cm²

PS Vita (1st model, wifi version) :
18.2 cm (width) by 8.35 cm (height)
(7.2 in x 3.289 in)
= 151.97 cm² (even a little less, vita is not rectangular)

I put my ps vita with a soft case or my 3DS in my pocket, but ps vita is close to the maximum size I can put, so I know I can't do the same with the Switch.

So yes, Switch is bigger, and his claim sounds legit to me.

What does any of that have to do with Yoko? I've never mentioned anyone in this thread once, nor do i see why their comments effect Yoko's ability to have a preference. People on the internet saying things you don't like about a video game console really shouldn't frustrate you to this point. It's a console, not a family member.

Of course he is completely entitled to his opinion, the problem is when people tries to use this opinion against the console and claim it has a problem just cause this guy is already very used to the size of his Vita and thinks switch is big, specially when many times this people haven't hold it on their hands to claim that is too big.

I totally thought switch was not very portable, and then i tried it, I saw it in fron of me, and I realized that screen fits in most pockets, so I was pleasently surprised to see the thing is indeed pretty portable and I think some people has the same impression I had before touching it and kind of use comments like this to confirm their fears (or in some cases wishes), that's all.

Of course we also cannot rule out the posibility of this guy just seeing something wrong with switch cause he wants to see something wrong with it, happens constantly when someone doesn't want to accept that he could actually love something from a different brand, there is nothing evil about it but it happens.

They are the same size mate I'll post images when I get back from work, the only extra length Switch gains is from the JCs which are customizable in how they're used, the actual tablet divice is blow for blow the same size as the Switch tablet, Vita is infact longer then the Switch while the latter is a few mm bigger in height. This is what makes the statement odd, he's free to have a preference but that doesn't mean the statement isn't some what contradictory.

Did you read my comment?

I already know the Switch's screen is comparable to the Vita as a whole, which is where i imagine his issue stems from. You might be able to take them off, but if you're using the Switch as a handheld (which he assumably is, based on his comparison to the Vita) then the JCs are somewhat necessary to... well, play on it. With the JCs, the Switch is a decent chunk larger. I see no contradiction.

I think you yourself never read what I initially posted because I always refered to the tablet unit's size and that the JC custom usage was an evolution of handheld and portable gaming, if you never realized this when I posted that's not my problem as the device itself is the same size as the Vita even more so for anyone playing with the JCs detached. If he's reffering to the JCs being attached then he should clarify just that.

Thinking on it some more, I find his comment kind of strange, as well as wanting a smaller version of the system, because the main reason the console is its current size is because of the screen. I imagine the screen size was decided to best display home console visuals on the go. Compacting all that detail into a small screen may be a little difficult on the eyes for some people. Playing Zelda on a screen the size of the Vita may not be the best, as there's a lot to take in and that would be harder to see on a smaller screen. If you compare the buttons of the joy cons, they are the size of the 3DS and Vita buttons. So essentially, he'd be wanting a smaller screen to make this easier to carry around. Though I dunno if I'd wanna play console-like games on such a small screen...

Why would he need to clarify that? He's comparing it to a handheld, and adds further context with the mention of mobile gaming. I think we can reasonably assume he's referring to the Switch as a handheld. He's not going to get very far if he just holds the screen :p

But fine, let's pretend we're robots and can't read context, and assume he is actually using it as a tablet. We're still left with 2 remaining possibilities; either it's a bit too much for him to conveniently carry around (he's going to need the JCs whether they're plugged in or not), or maybe he just outright doesn't like the size. As i mentioned to Goodnightmoon earlier, both the iPad and iPad Air fit in my hands fine perfect fine, but i still prefer the Air. Everything being a bit more condensed works well for me. Alas, i now know my preference is a contradiction with... something.

As an expression of preference regarding the design of the Switch, i see no contradiction at all. Doubly so when that expression is so incredibly tame. 

I already gave the dimensions previously in this thread, and even without JCs, Switch is bigger than Vita (if measures are right, I took them from wikipedia) :