be streets ahead (of someone or something)

To be superior by a large margin. Primarily heard in UK, Australia. Based on the boss's praise, it sounds like I'm streets ahead of everyone else in the department. My sister's such a talented artist that her work is just streets ahead of the other entries in the competition. This computer system is certainly streets ahead in terms of cost and performance.

be ˈstreets ahead (of somebody/something)

(British English, informal) be very much better (than somebody/something): Japan is streets ahead of us in computer technology.