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Synology DS1522+ — NAS · $699
Synology

Synology DS1522+

NAS · $699

88
/ 100
From $699
VS
Asustor Flashstor 12 Pro — NAS · $1099
Asustor

Asustor Flashstor 12 Pro

NAS · $1099

88
/ 100
From $1,099
Specdex verdict

Dead heat — it comes down to priorities.

In our weighted Specdex score, Synology DS1522+ lands at 88 and Asustor Flashstor 12 Pro at 88. With scores tied, the decision hinges on which sub-scores matter most to you.

Pick Synology DS1522+ if…

  • ✓Rich software ecosystem (Synology/QNAP)
  • ✓NVMe cache slots on newer models
  • ✓Docker/VM support on higher tiers

Pick Asustor Flashstor 12 Pro if…

  • ✓Rich software ecosystem (Synology/QNAP)
  • ✓NVMe cache slots on newer models
  • ✓Docker/VM support on higher tiers
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Winner by scenario

Derived from the sub-score breakdown · not a separate test

Performance

Tie

Compared on the performance sub-score

Effectively tied — neither pulls a 2-point weighted lead.

Features

Tie

Compared on the features sub-score

Effectively tied — neither pulls a 2-point weighted lead.

Software

Tie

Compared on the software sub-score

Effectively tied — neither pulls a 2-point weighted lead.

Value for money

Synology DS1522+

Specdex score per dollar at MSRP

Synology DS1522+ more score per dollar ($699 vs $1,099).

Synology DS1522+ 88
vs
88 Asustor Flashstor 12 Pro

Score breakdown

Synology DS1522+
88
performance 88
features 88
software 86
value 82
Asustor Flashstor 12 Pro
88
performance 88
features 88
software 86
value 82

Specs side-by-side

Synology DS1522+ versus Asustor Flashstor 12 Pro — full spec comparison
Spec Synology DS1522+ Asustor Flashstor 12 Pro

Synology DS1522+

Pros
  • +Rich software ecosystem (Synology/QNAP)
  • +NVMe cache slots on newer models
  • +Docker/VM support on higher tiers
Cons
  • −Disks rarely included
  • −Drive compatibility restrictions on some brands
  • −Power draw 24/7

Asustor Flashstor 12 Pro

Pros
  • +Rich software ecosystem (Synology/QNAP)
  • +NVMe cache slots on newer models
  • +Docker/VM support on higher tiers
Cons
  • −Disks rarely included
  • −Drive compatibility restrictions on some brands
  • −Power draw 24/7

FAQ: Synology DS1522+ vs Asustor Flashstor 12 Pro

Which is better, Synology DS1522+ or Asustor Flashstor 12 Pro? +

Both score 88 on our weighted rubric — tied. Your best pick depends on the sub-scores above.

Is Synology DS1522+ worth the price? +

At $699, Synology DS1522+ delivers a Specdex score of 88 — strongest in performance.

Is Asustor Flashstor 12 Pro worth the price? +

At $1,099, Asustor Flashstor 12 Pro delivers a Specdex score of 88 — strongest in performance.

Does Synology DS1522+ or Asustor Flashstor 12 Pro last longer? +

Based on our long-term update and support ratings, both ship with multi-year support. Battery and reliability scores are visible in the breakdown above.

Which is the better value, Synology DS1522+ or Asustor Flashstor 12 Pro? +

Synology DS1522+ — more score per dollar ($699 vs $1,099). Specdex score per dollar at MSRP.