Proton-K/DM vs Proton-M Briz-M
Side-by-side comparison across specs, pricing, and overall score — every value traced to a source.
Verdict: Proton-M Briz-M ranks highest overall (#4) with a score of 58.2.
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 Proton-K/DM if Failed Launches is weighted at 40% (it counts for 13% today). If failed launches drives your decision, the ranking above may not be your ranking.
Fragile verdict
The overall winner flips to Proton-K/DM if Length is weighted at 40% (it counts for 6% today). If length drives your decision, the ranking above may not be your ranking.
Real tradeoff
Proton-K/DM clearly beats Proton-M Briz-M on Failed Launches but clearly loses on Successful Launches — this pair is a priorities question, not a quality question.
What nobody reports
LEO Capacity (1 of 2 missing) — the questions worth asking vendors directly.
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| Metric | Proton-K/DMKhrunichev State Research and Production Space Center | Proton-M Briz-MKhrunichev State Research and Production Space Center |
|---|---|---|
| Overall OptiSift Score | 39.2#17 | 58.2#4 |
| LEO Capacity | — | 21,000 |
| Successful Launches | 61 | 62 |
| Failed Launches | 5 | 6 |
| Launch Mass | 711 | 712 |
| Length | 59 | 53 |
| Diameter | 4.15 | 7.4 |
| Reusable | No | No |