The word "differentuality" isn't in the dictionary. See some spelling suggestions below:
differentiate - to mark or show a difference in : constitute a contrasting element that distinguishes features that differentiate the twins how we differentiate ourselves from our competitors
differentiation - the act or process of differentiating; development from the one to the many, the simple to the complex, or the homogeneous to the heterogeneous
differential - of, relating to, or constituting a difference : distinguishing differential characteristics : making a distinction between individuals or classes
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