Dave, not having any knowledge on this subject I would have thought that there are no-doubt a few things to consider!!!!! Top of my head:
If you are wanting to balance weight then linked tanks would be the way forward.
If you want to have seperate supplies in-case one gets water ingress or leaks then no.
Perhaps you could have best of both with 2 feeds to the fuel seperator and a link pipe between the tanks with a shut off valve.
Rob