OWL's EquivalentClass vs. SubClassOf

Question

What is the difference between EquivalentClass and SubClass of? While reading through OWL primer, i find the tutorial uses SubClassOf a lot to declare a new class, as follows

SubClassOf(
  :Teenager
  DataSomeValuesFrom( :hasAge
    DatatypeRestriction( xsd:integer
      xsd:minExclusive "12"^^xsd:integer
      xsd:maxInclusive "19"^^xsd:integer
    )
  )
)

Can I write

EquivalentClass(
  :Teenager
  DataSomeValuesFrom( :hasAge
    DatatypeRestriction( xsd:integer
      xsd:minExclusive "12"^^xsd:integer
      xsd:maxInclusive "19"^^xsd:integer
    )
  )
)

instead?