Inheritance (IS-A relationship)

• Might violate encapsulation

• Turns out bad when it comes to maintenance of code

• Code duplication across subclasses

• Changes in parent class affect the child classes

• Less flexible

Composition (Has-A relationship)

• Provides a lot of flexibility for changes in behavior

• Encapsulate a family of algorithms into their own set of classes (sounds similar)

To summarize - referring to Strategy Design Pattern.