Comparison
Glera vs Sémillon
How Glera and Sémillon differ, dimension by dimension.
The short answer
The main differences: Glera has more floral character; Glera has more carbonation; Sémillon has more oak influence.
Where they genuinely differ
Only differences large enough to notice in the glass are listed here. A gap of half a point on a five-point scale is noise, and WineHQ does not dress it up as a finding.
Floral character
Clear differenceBlossom, rose, violet, elderflower, acacia and related aromatic notes.
Glera is more floral: medium-plus against low.
Carbonation
Clear differenceDissolved carbon dioxide, from completely still through lightly prickly to fully sparkling.
Glera is more sparkling: medium-plus against low.
Oak influence
Clear differencePerceptible impact of barrel or alternative oak contact — vanilla, toast, coconut, smoke, cedar and added texture.
Sémillon is more oaky: medium against low.
Texture
Clear differenceMouthfeel independent of weight — from lean and cutting through to creamy, waxy or velvety. Driven by lees contact, malolactic conversion, skin contact and ageing.
Sémillon is rounder and creamier in texture: medium-plus against low-medium.
Sweetness
Clear differencePerceived sugar in the finished wine, driven mainly by residual sugar but modified by acidity, alcohol and fruit ripeness.
Sémillon is sweeter: medium against low-medium.
Acidity
Clear differenceTotal perceived acidity. Rises in cooler climates and with earlier picking; falls with heat and ripeness.
Sémillon is fresher and more acidic: medium-plus against medium.
Where they are much the same
Just as useful: knowing which parts of the choice do not matter.
- Tannin: Similar — both low.
- Alcohol: Similar — both medium.
- Fruit intensity: Similar — both medium.
- Herbal / green character: Similar — both low.
- Spice: Similar — both low.
Full side by side
| Dimension | Glera | Sémillon |
|---|---|---|
| Floral character | typically medium-plus, ranging from medium to medium-plus (4/5) | low (1/5) |
| Carbonation | typically medium-plus, ranging from medium to medium-plus (4/5) | low (1/5) |
| Oak influence | low (1/5) | typically medium, ranging from low to medium-plus (3/5) |
| Texture | low-medium (2/5) | typically medium-plus, ranging from medium to high (4/5) |
| Sweetness | typically low-medium, ranging from low to medium (2/5) | typically medium, ranging from low to high (3/5) |
| Acidity | typically medium, ranging from low-medium to medium-plus (3/5) | typically medium-plus, ranging from low-medium to high (4/5) |
| Body | typically low-medium, ranging from low to medium (2/5) | typically medium, ranging from low-medium to medium-plus (3/5) |
| Aromatic intensity | typically medium, ranging from low-medium to medium-plus (3/5) | typically low-medium, ranging from low to medium (2/5) |
| Savoury character | low-medium (2/5) | typically medium, ranging from low-medium to medium-plus (3/5) |
| Perceived freshness | typically medium-plus, ranging from medium to medium-plus (4/5) | typically medium, ranging from low-medium to medium-plus (3/5) |
| Tannin | low (1/5) | low (1/5) |
| Alcohol | typically medium, ranging from low-medium to medium (3/5) | typically medium, ranging from low-medium to medium-plus (3/5) |
| Fruit intensity | typically medium, ranging from low-medium to medium-plus (3/5) | typically medium, ranging from low-medium to medium-plus (3/5) |
| Herbal / green character | low (1/5) | low (1/5) |
| Spice | low (1/5) | low (1/5) |
| Earthy character | low (1/5) | low (1/5) |
| Serve at | 7–10°C | 11–14°C |
| Typical flavours | green apple, white peach, pear, honeysuckle, melon | lemon, lanolin, beeswax, honey, toast |
Values are typical points within each wine’s range. Both wines vary — see the individual pages for how much.
Read more
Grape
Glera
The grape of Prosecco: neutral, floral and low in acid, designed for tank-method sparkling wine.
Grape
Sémillon
A thin-skinned, botrytis-prone variety essential to Sauternes and to a unique long-lived dry style in the Hunter Valley.
Comparison
Sémillon vs Sauvignon Blanc
The two halves of white Bordeaux — what does each contribute?