German phrase
Was ist der Unterschied zwischen ~?
Meaning
What's the difference between ___?
When to use it
It asks how two things differ. Use it to compare their features neutrally.
Example dialogue
Was ist der Unterschied zwischen Äpfeln und Birnen?
What's the difference between apples and pears?
Äpfel sind fester und etwas saurer, Birnen sind weicher und saftiger.
Apples are firmer and a little more sour, while pears are softer and juicier.