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So the counter example I would use is the churchill crocodile vs the churchill 7. The churchill 7 is non doc, the churchill 7 is available earlier, but nobody in their right mind would say it's "stronger" then the churchill crocodile.
Likewise, penal PTRS are available earlier then guards, penal ptrs are non doctrinal, but nobody would say they are stronger then guards.
This doesn't mean the units aren't better then those doctrinal option at specific things, but I wouldnt call them "stronger" or "more effective" at the same roles.