How do you tell Marsanne and Roussanne apart in a blind tasting?

The clearest separator between Marsanne and Roussanne is acidity: Marsanne is Medium while Roussanne is Medium(+). Lead with that to resolve the blind call.

Is Marsanne or Roussanne higher in acidity?

On the WSET ladder, Marsanne is Medium and Roussanne is Medium(+) for acidity.

Are Marsanne and Roussanne red or white?

Marsanne and Roussanne are both white grape varieties.

Marsanne vs Roussanne — how to tell them apart

Structure compared

Structure compared	Marsanne	Roussanne
Acidity	Medium	Medium(+)
Body	Medium(+)	Medium(+)
Alcohol	Medium	Medium
Color intensity	Medium	Medium
Aromatic intensity	Medium	Medium(+)

Signature aromas

Marsanne

pearquincealmond

Roussanne

pearherbal teahoney

Common questions

How do you tell Marsanne and Roussanne apart in a blind tasting?: The clearest separator between Marsanne and Roussanne is acidity: Marsanne is Medium while Roussanne is Medium(+). Lead with that to resolve the blind call.
Is Marsanne or Roussanne higher in acidity?: On the WSET ladder, Marsanne is Medium and Roussanne is Medium(+) for acidity.
Are Marsanne and Roussanne red or white?: Marsanne and Roussanne are both white grape varieties.