How does simple metamorphosis in apterygotes differ from complete metamorphosis in butterflies?

The term "simple metamorphosis" is often used to describe the development of insects that undergo little to no change in form, though technically, apterygotes are classified as ametabolous rather than undergoing a formal metamorphic process.12

The differences between the development of apterygotes and the complete metamorphosis seen in butterflies are significant:

• Developmental Stages: Apterygotes (such as silverfish) exhibit ametabolous development, where young emerge from eggs as miniature versions of adults and simply increase in size through successive molts. In contrast, butterflies undergo holometabolous development, which includes four distinct stages: egg, larva, pupa, and adult.12
• Structural Change: Apterygotes change very little in form throughout their lives. Conversely, butterfly larvae are wingless and structurally distinct from adults, which are winged and sexually mature.132
• Transformation: The dramatic transformation of a butterfly occurs during the inactive, nonfeeding pupal stage, where larval tissues are broken down and adult structures are formed. Apterygotes lack this pupal stage entirely, continuing to molt even after reaching sexual maturity.213