The point of resemblance may be single (مفرد), such as redness or courage; it may comprise several distinguishable features; or it may consist of a composite configuration (مركب) in which multiple features form one coherent pattern.
FormCentral feature
SingleOne attribute, such as redness
MultipleSeveral separate features, such as brightness and warmth
CompositeAn arrangement forming a unified scene or shape
A long expression is not necessarily composite. What matters is whether the comparison is made through an organized overall configuration rather than through independently listed attributes.