Synology DS1522+ vs Synology DS1821+
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AI Matrix
Powered by Claude AISynology DS1522+ narrowly beats the Synology DS1821+ in the nas storage category, especially in value ($599 vs $799), scoring 52 vs 47. If you want the better overall nas storage, Synology DS1522+ is the recommended choice.
5 Reasons Why Synology DS1522+ Is Better
- 1.More RAM: 8GB vs 4GB — better multitasking
- 2.Lower price: $599 vs $799
- 3.Better battery score: 10 vs 3
- 4.Better value score: 67 vs 52
- 5.Higher overall score: 52 vs 47
What are you giving up?
Picking Synology DS1522+ over Synology DS1821+ means trading these off.
You give up
Nothing meaningful — Synology DS1522+ matches or beats Synology DS1821+ on every measured spec.
You gain
- +$200 cheaper ($599 vs $799)
- +More RAM: 8GB vs 4GB
Spec Comparison
Synology DS1522+Synology DS1821+
Score Breakdown
Synology DS1522+Synology DS1821+
35
Drive Bays25% weight
35Tie
67
Price20% weight
52Synology DS1522+ Winner
10
RAM20% weight
3Synology DS1522+ Winner
99
Power Usage15% weight
99Tie
94
Noise10% weight
92Tie
35
Warranty10% weight
35Tie
Scores are relative within the nas storagecategory. Percentages show each dimension's weight in the overall score. A difference of less than 0.5 points is considered a tie.
Synology DS1522+
Winner✓ Pros
- ●More RAM: 8GB vs 4GB
- ●Lower price: $599 vs $799
- ●Better battery score
Synology DS1821+
✗ Cons
- ●Higher price: $799 vs $599
- ●Less RAM: 4GB vs 8GB
Spec Comparison
| Spec | Synology DS1522+W | Synology DS1821+ |
|---|---|---|
| Price | 599$✓ | 799$ |
| RAM | 8GB✓ | 4GB |
| OS | DSM 7.2 | DSM 7.2 |
| Weight | 1100g | 1100g |
| Dimensions | 200 x 166 x 223 mm | 260 x 193 x 166 mm |
| Colors | Black | Black |
Who Should Buy
Buy Synology DS1522+ if…
Buy the Synology DS1522+ if you want the best overall value in this comparison. It scores higher overall and is the recommended choice for most buyers.
Buy Synology DS1821+ if…
The Synology DS1821+ is worth considering if you prefer its specific design, ecosystem, or brand — though it scores lower overall in our comparison.
Synology DS1522+ vs Synology DS1821+ — FAQ
Synology DS1522+ vs Synology DS1821+: which is better?
Synology DS1522+ narrowly beats the Synology DS1821+ in the nas storage category, especially in value ($599 vs $799), scoring 52 vs 47. If you want the better overall nas storage, Synology DS1522+ is the recommended choice.
Is Synology DS1522+ better than Synology DS1821+?
Yes, Synology DS1522+ scores higher overall (47 vs 60).
Which is cheaper, Synology DS1522+ or Synology DS1821+?
Synology DS1522+ is cheaper at $599 vs $799 for the Synology DS1821+.
Who should buy the Synology DS1522+?
Buy the Synology DS1522+ if you want the best overall value in this comparison. It scores higher overall and is the recommended choice for most buyers.
Who should buy the Synology DS1821+?
The Synology DS1821+ is worth considering if you prefer its specific design, ecosystem, or brand — though it scores lower overall in our comparison.
Which has more RAM, Synology DS1522+ or Synology DS1821+?
Synology DS1522+ has more RAM (8GB vs 4GB), which helps with multitasking.
Related Comparisons
Full Synology DS1522+ review →Full Synology DS1821+ review →All Synology NAS Storage →All Synology NAS Storage →
Reviewed by VersusMatrix Editorial Team
Last updated: April 25, 2026
Methodology: AI-powered analysis of technical specifications from manufacturer data. Scores are calculated by comparing products across multiple dimensions and normalized relative to the full category database. Our editorial process is independent and not influenced by affiliate partnerships.