Let's see...
Birds: have wings
Dinosaurs: have arms or front legs
Birds: have a short tail with feathers
Dinosaurs: have a long lizardlike tail
Birds: have a beak and no teeth
Dinosaurs: mostly have teeth
Birds: all have feathers
Dinosaurs: only sometimes have feathers
That seems enough!
I love both birds and dinosaurs. Part of loving someone is respecting their uniqueness!