a question on turntable bearing housing rigidity

i have read posts about flexion in the bearing housing,namely technics sp10's and the sony tts-8000.
with that in mind which (see photo) offers the most rigid assembly .
the housing on the left is the original one using pressed steel and a seperate cast aluminium bearing housing which is bolted to it.
the example on the right is a 1 piece cast aluminium affair.

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