Wrong! Perhaps you did not read the whole of the post in which I said 'Every player regardless of height/physique/whatever brings a set of unique qualities to the table. Some are fast, some tricky, some powerful, some tidy, some crafty etc.' I suggest that more than adequately covered the intangibles you claim I did not specify.
I have also answered your hypothetical question by pointing out it can never ever come down to that. It is why I argued you are over-simplifying the discussion about Pereira in the first place. Nothing can EVER be as simple as you would have it. Every player is bought on a calculation of his strengths and weaknesses. There is never ever going to be a time when two players of different heights are identical in every other respect so it is an utter waste of time trying to hypothetise about it.
Apologies - you did specify your intangibles. However, they are hardly so exclusive as to not be common across players. Fast, tricky, powerful, tidy, crafty...these are not numerically-defined as much as they are general statements of a player's attributes, and those can be replicated across many players.
Take, for instance, Nelson Semedo and the same Ricardo Pereira that we're linked with. Both are right-backs, both are young both are fast, both are tricky, both are tidy on the ball, both are uncommonly creative (which is what I assume you meant by 'crafty'). In fact, even height wise, they're roughly comparable - 175cm to 177cm. And they're both young, and they're both Portuguese, and they both play for top Portuguese clubs (Semedo for Benfica, Pereira for Porto) and they're both highly rated.
Are they 100% identical? No, of course not. But, as I stated above, in situations where equal is too stringent a requirement, *comparable* gets the point across just fine. They are comparable in their footballing attributes - very much so. So much so, in fact, that they're *nearly* identical.
It is not rare to have this situation. It is rare (but not impossible) to have two players so similar that they are alike, but it is quite possible to have a scenario where players are almost indistinguishable on a practical level - and height enters the equation as a vital differentiating factor in those scenarios, *always* slanted towards the taller player being more preferable. It's just logical. Not in this case, because the difference is so marginal as to be irrelevant, but in cases with a more pronounced height difference? Certainly.