No doubt, more differences will be discovered. Another possibility is that a designer gave both birds and dinosaurs some common features, because each had similar needs. For example, gears are common to cars, bicycles, windmills, and watches. Everyone knows they were designed. No one teaches, advocates, or even considers that windmills turned into cars or watches.
Efficiency dictates design similarities.
Since the early 1980s, several prominent scientists have charged that the two Archaeopteryx fossils with clearly visible feathers are forgeries. Bird feathers were then imprinted into the wet cement. There is a long list of similarities between Compsognathus and Archaeopteryx . Skeletons of Compsognathus are also found at the same site in Germany where Archaeopteryx was found. Finally, Archaeopteryx should not be classified as a bird.