a horse of a different color
idiomPart ofhorse
a horse of a different color — idiom
1. A completely different matter or situation from the one being discussed.
1.idiom
Definition
A completely different matter or situation from the one being discussed.
Example
Renting a car is cheap, but buying one is a horse of a different colour.
Sana could handle a small project, but leading the whole team was a horse of a different colour.