Soyuz-U-PVB vs Soyuz U
Side-by-side comparison across specs, pricing, and overall score — every value traced to a source.
Verdict: Soyuz U ranks highest overall (#2) with a score of 69.8.
The best choice still depends on which specs matter for your workload — per-metric winners are marked below.
What the numbers hide
Computed from the published values below — no estimates, no generated claims.
Fragile verdict
The overall winner flips to Soyuz-U-PVB if Successful Launches is weighted at 15% (it counts for 31% today). If successful launches drives your decision, the ranking above may not be your ranking.
Fragile verdict
The overall winner flips to Soyuz-U-PVB if Failed Launches is weighted at 30% (it counts for 13% today). If failed launches drives your decision, the ranking above may not be your ranking.
Real tradeoff
Soyuz-U-PVB clearly beats Soyuz U on Failed Launches but clearly loses on Successful Launches — this pair is a priorities question, not a quality question.
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| Metric | Soyuz-U-PVBProgress Rocket Space Center | Soyuz URussian Federal Space Agency (ROSCOSMOS) |
|---|---|---|
| Overall OptiSift Score | 53.2#5 | 69.8#2 |
| LEO Capacity | 6,900 | 6,900 |
| Successful Launches | 72 | 694 |
| Failed Launches | 2 | 20 |
| Launch Mass | 313 | 313 |
| Length | 51 | 51.1 |
| Diameter | 3 | 2.95 |
| Reusable | No | No |