If you only can choose one random orbit sander?

I got the Mirka version with the 5" and 6" pads.

That's unanimity. More unanimity thans measure units 🤔🙂
From what I see Deros is another type/shape of sander than mafell eva or festool ets.
Much lighter but, better vibration control?
I can't find comparisons between the mirka, the festool and the mafell.

Yes, that's the one:  Mirka 5650.  Great tool.

You can even get it in a choice of colours now:  in Bumble-Bee Black & Gold as a Mirka, military Olive Green (Metabo), a racy Fire Engine Red (CarSystem), stunning Sky Blue (Sumake), a discrete & stylishly understated Pale Grey/Black (Delmeq), conservative Beige/Black (Indasa) or boringly serious plain Black (Rupes).  Cute.

Only the first 2 come in a fancy licenced German plastic box, the rest in cardboard.  The first 2 also come with potentially troublesome "Plug-It" type cables.  The rest have permanently fixed cables.

The first 2 (obviously) cost more, but as far as I'm aware all replaceable parts are 100% compatible, although the Rupes Skorpio appears somewhat superficially unique.

So not only is it the world's finest Rando Sander, but also undoubtedly the most stylish as well!  Able to co-ordinate with just about any themed decor the heart desires.

A sander for each & everyone!  Serious users & fashionistas alike.

I have both the 5650 and the UVA.
The UVA is orbital and square and very low vibration.
The 5650 sands faster.

What is you plan? And how would you use them?

It looks like that one is yet another unknown clone of the Mirka.  Any visual differences are merely superficial.  If so, then that makes them the absolute bloody bargains of the century!  If they're available, then jump on em!  You can get both a finisher AND general purpose 5.0mm sanders for the price of a single Mirka!  I can't get one (EU export/licencing restrictions?), so I'm actually jealous as buggery.  I'd love such a bargain-priced, high quality finisher.  Look at the reviews:  5 stars all the way, & all in German (plus a couple of Frenchies), too.  A customer base not usually so easily pleased. 

As for who actually makes the Mirka family, I suspect (but don't know definitively) that assembly maybe occurs somewhere in the far East, from components supplied from Mirka's Finnish factory. Or vice-versa

My vote is in Taiwan, where Sumake is based. The only visually different one (a different shape) is Rupes, which might be manufactured in the old Italian Felisatti factory from Finnish electronics. Sumake produce a huge range of tools, many of which are based around Mirka's EC motor.

The fact that all are merely different coloured clones of essentially the same tool should be indicative of inherent superior design. All these alternate licencees would theoretically have the pick of just about any small-medium manufacturer anywhere in the world to produce sanders for them. Apart from one well-known, notoriously spoilt & jealous German manufacturer that won't play with anyone else:  after acquiring yet another sander & SCMS manufacturer they promptly cancelled any further dealings or licencing arrangements with all former licencees, of which there were originally quite a few.

They all chose Mirka. Because??

Obviously the sums work for all parties. Mutual profitability, economies of scale in production, product (well colour anyway) differentiation, etc.   But also mainly because it's a winning design. The first truly "new" sander design since the Rotex was developed in the late 70's.

I dispute that Mafell's EVA pair are comparable with Mirkas or their clones. Maybe with randos from Bosch Blue, Metabo's Turbotec, or Festool's ETS range perhaps (all good sanders, by the way), but all lack the unique benefits of the Mirka "family". The Mirka clones will be HALF the weight (or even less), are specifically designed for mesh abrasives (the only tools available that are), have paddle actuation, and are the only full-size sanders that can be easily & safely operated by anybody (even smaller people, females, kids etc) one handed.

Seriously Iban, how much more convincing do you need?

The manzer has nice reviews. Have you seen the 1st one comparing with mirka? Little heavier and bigger than mirka, same power, no instant stop and almost half price.
Well you know... I like to make a lot of research before an important buy