FlowKooler or Milodon water pump

MOPAROFFICIAL said
Probably close to the same. But check their sites for specs.

Really...those are designed to fix or anticipate a couple issues or weak points..like very high rpm cavitation, extra volume, maybe a better bearing.

Stock 8 blade impeller is more than enough when the cooling system is properly sized and holding pressure.

I've installed both, at the request of customers, and I didn't see any difference in operation. They were chosen perhaps more for prevention, rather than to address an evident/ongoing problem, so there was no noticeable "improvement".