they are two different animals, with respect to how they work and how they should be configured. The Bosch is a great pump but because of the design you need a fuel filter before and after the pump, as the 044 can displace particles into your fuel. It is a tried and true, reliable pump. The Aeromotive on the other hand is quite impressive on it's output readings and doesn't require a fuel filter after the pump. I have run both a dual external walbro setup and a single Aeromotive stealth 340 pump, and I am currently running the Stealth 340.
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