Same grape, different wine
Sémillon around the world
Across 3 still-wine expressions, Sémillon varies most on herbal / green character — from low in Hunter Valley Semillon to medium-plus in South African Sauvignon Blanc. 3 dimensions differ meaningfully between them, which is why "do you like Sémillon?" is not really one question.
Where they differ
Only the dimensions on which these wines genuinely diverge. Anything varying by less than a scale point and a half is left out, because it would be noise.
| Dimension | Lowest | Highest | Gap |
|---|---|---|---|
| Herbal / green character | Hunter Valley Semillon | South African Sauvignon Blanc | 3 points |
| Alcohol | Hunter Valley Semillon | White Bordeaux | 2 points |
| Oak influence | Hunter Valley Semillon | White Bordeaux | 2 points |
The expressions
Ordered from lightest to fullest, so the page reads as a gradient rather than a list.
Hunter Valley Semillon
Warm climateOne of wine’s genuine oddities: picked early at 10–11%, almost neutral when young, and transformed into toast and honey after a decade without ever seeing oak.
Against its siblings: riper and less green, lighter in alcohol, less oaky.
- Warm climate. Fuller ripening tends to raise sugar and therefore alcohol, soften acidity, and push fruit character from tart towards ripe and jammy.
- No oak. Fermented and aged in steel or neutral vessels, so what you taste is fruit and site rather than barrel.
White Bordeaux
Moderate climateA Sauvignon Blanc–Sémillon blend, frequently barrel-fermented, combining citrus freshness with waxy weight.
Against its siblings: more oaky.
- Lees ageing. Time on spent yeast adds texture, breadth and a savoury, bready depth.
South African Sauvignon Blanc
Cool climateCool coastal Sauvignon from Constantia, Elgin and Durbanville — restrained, flinty and mineral.
Against its siblings: more herbal and green.
- Cool climate. Slower ripening tends to retain acidity and hold alcohol down, and green or citrus notes survive where a warmer site would ripen them away.
- Lees ageing. Time on spent yeast adds texture, breadth and a savoury, bready depth.
Sweet expressions
Sémillon is also made this way. These sit outside the comparison above, because comparing a sparkling wine with a still one on body or oak tells you about the method rather than the grape.
Sauternes
Moderate climateThe benchmark botrytised sweet wine: honey, apricot and saffron, held together by piercing acidity.
- Noble rot. Botrytis cinerea dehydrates the berry and adds its own honey and marmalade character alongside the concentrated sugar.
- Residual sugar. Fermentation stopped before all the sugar was consumed, which softens acidity and changes what the wine can be drunk with.
Nothing here is written by hand. The comparison is computed from the taste profiles held for each style, and the drivers listed under each wine are read off structured data — the region’s climate, the style’s recorded production methods, its oak and sweetness bands. That means this page cannot drift out of step with the style pages it describes, and it also means it says less than a wine writer would: a cause is only listed when the catalogue actually records it. See the taste model.