I recall FWW did a mechanical destruction lab test(+) a number of years ago. W/O looking it up, my recollection is that the difference was essentially noise; it certainly wasn't any major difference.
(+) They manufactured various joints from simple lap to full M&T in their shop and took them to a uni lab (I want to say Case Western) where the loading tests/measurements were done in one of their labs. It was pretty well done as opposed to some of the writer-submitted homebrew setups that often lack either control or decent measurement techniques, etc., ...
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