The only caveat is...almost all the aftermarket companies sell an Aquatec DDP5800.....and there seem to be a lot of variations !
Whether it's open flow, current load ( at max pressure I presume ), or pressure they claim they are capable of making ( which often is not what they make in reality )
And there are various chamber designs, whether twin ( outdated, don't really think anyone uses that anymore ) or the common triple...whether with push fittings or threaded fittings.
My current one is the AEM 200psi pump....which in reality only makes 145psi on mine. It's listed as 1.0gpm and 10A. I've a new pump on the way from another seller and it has a sticker saying 1.3gpm and 12A, but visually it's the same, so will see how it compares. Mine is also a few years old, so who knows although most of the flow/pressure testing I did was back in 2018.