Fuel pump decision

Hello, for those on race gas and pump, efi which would you rather run two pumps controlled separately second to come on at a set psi, or a single that will handle it All? For the two inline looking at AEM 400lph pumps or just go with a magna Fuel 625 or 525 series, looking for around 1000hp on pump and 1600hp on c12, the magna is only $100 more but less plumbing for sure. Thoughts???