Intel Management Engine and AMD Platform Security Processor -- which processor is the lesser evil?

Between the ME and PSP, which is less likely to present a vulnerability? On one hand, the PSP can be disabled in the BIOS (assuming it can't reenable itself), and doesn't have access to the network stack. The ME does seem to have had more vulnerabilities in the past, but as I understand there do exist third party utilities that can disable it.

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