Glenisla 34 Year Old 1977 (cask 19605) - Cask Strength Collection (Signatory) vs Glen Grant 20 Year Old 1992 (cask 446106) - The Octave (Duncan Taylor)
Side-by-side comparison — price, ABV, scores, tasting notes, pros & cons.

Glenisla 34 Year Old 1977 (cask 19605) - Cask Strength Collection (Signatory)
Glen Keith
£170

Glen Grant 20 Year Old 1992 (cask 446106) - The Octave (Duncan Taylor)
Glen Grant
★ 5.00
£106
| Glenisla 34 Year Old 1977 (cask 19605) - Cask Strength Collection (Signatory) | Glen Grant 20 Year Old 1992 (cask 446106) - The Octave (Duncan Taylor) | |
|---|---|---|
| Distillery | Glen Keith | Glen Grant |
| Region | Speyside | Speyside |
| Country | Scotland | Scotland |
| Type | Single Malt | Single Malt |
| ABV | 44.3% | 52.5% |
| Age | 34 yr | 20 yr |
| Price | £169.51 | £106.37 |
| Rating | — | 5.00/5 |
Glenisla 34 Year Old 1977 (cask 19605) - Cask Strength Collection (Signatory)
Glen Grant 20 Year Old 1992 (cask 446106) - The Octave (Duncan Taylor)
Glenisla 34 Year Old 1977 (cask 19605) - Cask Strength Collection (Signatory)
Glen Grant 20 Year Old 1992 (cask 446106) - The Octave (Duncan Taylor)
Quick verdict
Glen Grant 20 Year Old 1992 (cask 446106) - The Octave (Duncan Taylor) is rated higher (5.00 vs 0.00).
Glen Grant 20 Year Old 1992 (cask 446106) - The Octave (Duncan Taylor) is better value at £106 vs £170.
For beginners: Glenisla 34 Year Old 1977 (cask 19605) - Cask Strength Collection (Signatory) is more approachable (60/100 beginner score).
Glenisla 34 Year Old 1977 (cask 19605) - Cask Strength Collection (Signatory)
Pros
- +Longer maturation (34 vs 20 years)
- +Rich oak and wood spice complexity
Cons
- −More expensive (£169.51 vs £106.37)
- −Lower community rating (0.0 vs 5.0)
Glen Grant 20 Year Old 1992 (cask 446106) - The Octave (Duncan Taylor)
Pros
- +Better value for money
- +Higher community rating (5.0/5)
- +More affordable (£106.37 vs £169.51)
- +More widely reviewed by the community
Cons
- −High ABV (52.5%) — may need water
Who should buy Glenisla?
Glenisla 34 Year Old 1977 (cask 19605) - Cask Strength Collection (Signatory) suits whisky enthusiasts looking for a well-rounded, complex dram. It rewards those with some experience and an appreciation for Speyside character.
Who should buy Glen?
Glen Grant 20 Year Old 1992 (cask 446106) - The Octave (Duncan Taylor) is for enthusiasts who appreciate cask-strength intensity. Best enjoyed with a few drops of water to open up the flavours. Not ideal for casual drinking or beginners.
Tasting notes
Only Glenisla 34 Year Old 1977 (cask 19605) - Cask Strength Collection (Signatory)
Only Glen Grant 20 Year Old 1992 (cask 446106) - The Octave (Duncan Taylor)