Comparison
Kettle sour vs Scottish ale
What is the difference between Kettle sour and Scottish ale?
The short answer
The main difference is acidity: Kettle sour has far more of it than Scottish ale. Scottish ale also leads on malt intensity, caramel & toffee and bread & biscuit.
Generated from the two style records. No editor has written this comparison up, so it carries no verdict beyond what the data supports.
Where they overlap
They share comparable sweetness, overlapping strength ranges — the boundary between them is narrower than the comparison suggests.
Side by side
| Kettle sour | Scottish ale | |
|---|---|---|
| Family | Sour & wild | Amber & dark ale |
| Fermentation — The clearest structural difference between these two — it shapes everything the yeast contributes. | Mixed fermentation | Top-fermented (ale) |
| Origin | United States | United Kingdom |
| Category status — One of these is a more settled category than the other, which is worth knowing before treating the comparison as exact. | Commercial category | Established |
| Strength | 3.5–6% ABV | 2.8–6% ABV |
| Bitterness (IBU) — IBU measures iso-alpha acids in the lab. It does not track perceived bitterness, which residual sweetness, body and roast all alter — compare the sensory rows below for how each actually tastes. | 2–10 IBU | 10–25 IBU |
| Colour | Straw to fruit-derived colour — 3–20 SRM, 6–39 EBC | Amber to dark copper — 13–22 SRM, 26–43 EBC |
| Original gravity | 1.036–1.055 | 1.030–1.056 |
| Final gravity | 1.004–1.012 | 1.010–1.018 |
| Serving temperature | 4–8°C | 10–13°C |
| Carbonation | 2–3 vol CO₂ | 1–2 vol CO₂ |
| Glassware | Tulip glass | Nonic pint, Tulip glass |
| Clarity | hazy | clear |
How they taste different
| Character | Kettle sour | Scottish ale |
|---|---|---|
| Acidity | Moderate–High | Not characteristic |
| Malt intensity | Not characteristic | Moderate–High |
| Caramel & toffee | Not characteristic | Moderate–High |
| Bread & biscuit | Not characteristic | Moderate |
| Carbonation | High | Low |
| Berry | Low–High | Not characteristic |
| Yeast fruitiness (esters) | Not characteristic | Trace–Low |
| Bitterness | None | Trace–Low |
| Tropical fruit | Trace–Moderate | Not characteristic |
| Body | Trace–Low | Moderate |
Which should you choose?
- You want more acidity → Kettle sour
- You want more malt intensity → Scottish ale
Derived from where the two actually differ. Neither is better — this is a question of which difference you want.