FROM A LAYMAN'S PERSPECTIVE, EVERYTHING YOU HAVE POSTED IS TRUE, HIS.
1) Several of your assumptions change quite a bit if you add a Proper Inter-cooler system designed by the OEMs or by aftermarket inter-cooler experts like Corky Bell or Johnny Wang (formerly of Spearco Inter-coolers).
Robert Paxton McCulloch's centrifugal supercharger was never efficient in terms of moving airflow with its straight vane compressor wheel design.
The Ball Bearing Drive system for blade rpm multiplication slipped at boost levels over 10 psi then the supercharger's drive system failed.
The Gear Driven Superchargers designed by Jim Middlebrook and J.R. Granatelli were the first efficient compressor wheel devices. They adapted Turbocharger compressor wheels to work with the gear drive parts vs the exhaust system. They ran much cooler with a proper wheel design vs the other aftermarket units.
So in a simplistic comparison, you have a good summary.
In reality in use with the proper parts several of your assumptions change quite a bit.
Tom V.
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"Engineers do stuff for reasons" Tom Vaught
Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward.
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