Ryan McAvoy said:

As a writer of film scores Williams is overrated IMO. Brilliant, but overated. Ennio Morricone and Bernard Hermann are the greatest ever composers of film scores. Every score they did featured a whole new soundscape of different instruments and emotional depths.

The linking scores in Williams work are usually a rehash of everything he's done before. Star Wars, Harry Potter, Indiana Jones, Jurassic Park are so similar.

None of his scores are truly the same though.

Jurassic Park uses much more synth than Star Wars.

Harry Potter uses much more Celeste than Indiana Jones (except KOTCS)

With each Indy score, the style difference is huge, Raiders is mostly minor keyed, Temple is frenetic, Crusade is laid back, humorous, and emotional, KOTCS has more Sci-fi.

Star Wars is more Romantic than the others.

and plenty of Williams scores had "new" soundscapes