Why is a genus-and-differentia definition problematic when applied to God?

Divine Transcendence: Form, Essence, Place and Time

• A genus-and-differentia definition appropriately differentiates God from divine peers
• The Creator can be classified as a species-member of a created genus
• It would place God in a genus of comparable kinds distinguished by a species-character
• Sharing a genus has no implication for classifying the divine essence