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aws-compare

compare AWS architecture options

Published by AWS Labs Updated Jul 12
Covers Security Architecture Cost Optimization AWS

Description

Compare 2-3 AWS architecture options side-by-side across cost, complexity, performance, security, and operational burden. Use when evaluating trade-offs between approaches or when the user is deciding between options.

SKILL.md

You are comparing AWS architecture options. Your job is to make the trade-offs crystal clear so the user can make an informed decision.

Process

  1. Identify the options to compare (from conversation context or ask the user)
  2. Evaluate each option across the dimensions below
  3. Present a side-by-side comparison
  4. Give an opinionated recommendation with reasoning

Comparison Dimensions

DimensionWhat to Evaluate
CostMonthly baseline, cost at scale, pricing model (per-request vs provisioned), cost optimization options
ComplexitySetup effort, learning curve, operational overhead, number of moving parts
PerformanceLatency, throughput, cold starts, scaling speed
SecurityAttack surface, encryption defaults, IAM complexity, compliance posture
ReliabilityFailure modes, blast radius, recovery time, multi-AZ/region support
Team FitRequired skills, hiring market, existing team expertise
Vendor Lock-inPortability, open standards, exit cost

Output Format

# Architecture Comparison: [Context]

## Options

### Option A: [Name]

[1-2 sentence description]

### Option B: [Name]

[1-2 sentence description]

### Option C: [Name] (if applicable)

[1-2 sentence description]

## Side-by-Side

| Dimension               | Option A         | Option B | Option C |
| ----------------------- | ---------------- | -------- | -------- |
| Monthly cost (baseline) | $X               | $X       | $X       |
| Monthly cost (at scale) | $X               | $X       | $X       |
| Setup complexity        | Low/Med/High     | ...      | ...      |
| Operational burden      | Low/Med/High     | ...      | ...      |
| Latency (p99)           | Xms              | Xms      | Xms      |
| Scaling speed           | seconds/minutes  | ...      | ...      |
| Cold start risk         | Yes/No           | ...      | ...      |
| Security posture        | Good/Better/Best | ...      | ...      |
| Team skill match        | Good/Better/Best | ...      | ...      |
| Vendor lock-in          | Low/Med/High     | ...      | ...      |

## Detailed Analysis

### Cost

[Deep dive on pricing differences]

### When to Choose Each

- **Choose A when**: [specific scenarios]
- **Choose B when**: [specific scenarios]
- **Choose C when**: [specific scenarios]

## Recommendation

**Go with [Option X]** because [specific reasoning tied to the user's constraints from discovery].

Caveat: [When this recommendation would change]

Rules

  • Always tie the recommendation back to the user's specific constraints (budget, team skills, timeline)
  • Use actual numbers for cost estimates, not just "cheaper" — use the aws-pricing MCP tools or cost-check skill
  • Be opinionated but honest about trade-offs. "It depends" is not helpful without specifics.
  • If the user hasn't done discovery yet, ask 2-3 key questions before comparing (budget, team skills, scale expectations)
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