From the official Kraken Q&A:
How does the Kraken’s armor compare to other ships in its size-class, like the Idris?
In true Drake fashion, the approach to construction prizes pragmatism and cost-effectiveness. Consequently, the Kraken is substantially less sturdy than the Idris and other dedicated military ships that are expected to face direct heavy or capital-scale firepower.
Reference: https://robertsspaceindustries.com/comm-link/engineering/16813-Q-A-Drake-Kraken
How does the Kraken’s armor compare to other ships in its size-class, like the Idris?
In true Drake fashion, the approach to construction prizes pragmatism and cost-effectiveness. Consequently, the Kraken is substantially less sturdy than the Idris and other dedicated military ships that are expected to face direct heavy or capital-scale firepower.
Reference: https://robertsspaceindustries.com/comm-link/engineering/16813-Q-A-Drake-Kraken