From what I know of Physics, I would say the 2 are the same.
Flow through the pipes varies with the driving pressure, and that would be the difference in height between the tank water level & the sump water level. In both setups, the height is the same, so I expect similar flows. <With or without the Durso.>
80 gal FW with 30 gal DIY wet/dry/sump.
9 fancy golds, 1 hillstream loaches, 1 rubber-lip pleco (C. thomasi), 3 SAEs, small school of white cloud minnows, planted.