Which one flows better, factory 6 blade water pump or 8 blade

My 2 cents;
From a streeter's point
I run a minimum coolant temp of 205*; that's the job of the hi-flow stat.
If/when the gauge starts climbing, I want to know why right away. So I built my system overkill so that when I raise the rpm at zero mph, instantly I see the temp drop. That way I have peace of mind.
Overkill:
>8-blade plated pump with the big shaft.
>As many blades as you can get; I run a 7-blade all-steel, hi-attack fan with the curved up tips.
>molded hoses with the anti-collapse spring in the suction side.
>a restricted bypass circuit; I use the heater as my bypass, until the summer weather warms up,lol..
> a shroud, and a core-support seal, with rad sealed to the sheetmetal
> For my 400hp 367, I use an ancient 1973 rad that came out of a smoggerteen Dart with A/C
> Straight Water is a way better coolant than 50/50 Ethylene Glycol; but I am forced by climate to run the 50/50.
> don't forget; fresh cold air into the carb. If you force your carb to process air at 300plus degrees, well, good luck with your nuclear reactor.
> to make it all work automatically, I installed a HD thermostatically controlled clutch, off an early 2000s Ford pick-up truck.

Now; before you yell powerloss!, think about it. As soon as your car hits about 35 mph, your radiator will be ram-air cooled and the clutch will freewheel. Forget any Magazine's fan-test!
Ok sure, below 35 mph, when that 7 blade kicks in @100%, it will stall your 273.(That's a poke). But it never does kick in @100% on mine, and I hardly ever notice it ( manual trans car). The thing is, whats more important; your mega-buck engine's life, or 5 hp@35mph, whenever the clutch kicks in? Hmmm?
My engine gets additional cooling from;
Fresh cold air to the carb,
the 7Qt oilpan,
aluminum heads,
AirGap intake,
camshaft EGR,and
the full length dual 3" exhaust pipes, with un-wrapped, and un-coated, headers.
I didn't mention the WP drive ratio, because contrary to popular practice, mine is underdriven, to give the stinking belt a fighting chance at staying in the grooves at 7200rpm.