Markedly different in level or ability; on a completely different tier (far superior or inferior).
プロの技術はアマチュアと段違いだ。
Professional skills are on another level compared to amateurs.
彼の演奏は同年代の中で段違いに上手だ。
His playing is far better than others of his age.
価格が段違いなので、このモデルを選んだ。
I chose this model because the price difference was huge.
段違いの練習量が彼をトップに押し上げた。
A vastly greater amount of practice pushed him to the top.
Uneven in height; having differing steps or levels (a physical mismatch in height).
古い階段は段違いでつまずきやすい。
The old stairs are uneven and easy to trip on.
床のタイルが段違いになっているので注意して歩いてください。
The floor tiles are uneven, so please walk carefully.