Actually, I would imagine they are nothing like one another.

However, Exynos uses a TrustZone TEE implementation to implement the KeyMaster module, just like Qualcomm's Snapdragon. This means that unless that TEE implementation uses a hardware key which is not software accessible, the same issue would be present. Of course, reverse-engineering a new TEE implementation would take a long time... But it sounds like it could be fun.