Particles with similar arrangement will be seen or felt as same. Whereas particle with different arrangement will be seen or felt different.
But we don't see everything e.g. air which is still made up particles. It's because our eyes which itself made up of particles receive the photons or particles and brain which is again made up particles has developed a mechanism to only see photon particles of the visible spectrum (i.e seeing only a particular type of arrangement). Leaving that arrangement we cannot see anything.
But how can brain made up of particles only see photon particles arrangement? It is because of the arrangement of particles in our brain i.e receptors. As we all know a particular arrangement only fits with another particular arrangement just like lock and key. But it can be erroneous to some extent, same as we can make duplicate keys which are not exactly the same (i.e. remains within the error range).
Is free choice related to the degree of error we make? Can we change our reality?
I think yes because we are free to choose the amount of error. We/particles are free to choose both 8 and 9 in the above diagram even though they are not same. So you can say it either 8 or 9, that depends on you, and choosing is random.
Even force between the quantized particle depends upon its number (number of the quantized particle). For example force between sun and earth depend upon its sizes. So the force (as it's not quantized) can never be perfect.
Whatever we measure is change (that is one is not same as other, one taken as a reference to compare other), and we can make the error to say that both are same, even though they are not, if it is in a range of making an error (±).