I'd just trust the Doepfer's OEM supply. Dieter's worked for many years on working out the PERFECT Eurorack supply, and the current revision of his big supplies are pretty spiffy.
Plus, if you've got concerns about hum and switching supply noise, there's other ways to fix that...namely, ferrites.
Ferrites are small bits of formed iron (and other metals) that are used to kill crap on DC lines. They're more common in RF applications, but they're relevant here, too. Have a look: https://www.dxengineering.com/parts/dxe-csb31-275-10 Now, how you'd use these in a modular is to kill crud before it gets into the DC busses. So, with each DC leg coming off of the P/S, you would take that wire, loop it around the inside and outside a couple of times, then snap it closed. That'll kill switching noise as well as sizable amounts of DC ripple.
Now, to avoid the hum issue...in this case, this is important if you do any live gigs, where you don't know how the grounding circuits work (if at all!) in order to dodge ground loops. It's also useful for killing crud that might be sneaking in via the outputs from a mixer/faulty cable/god knows what. And that device is this, or something along the same lines: https://www.modulargrid.net/e/happy-nerding-isolator. This is perhaps the simplest implementation of that...but simple doesn't equate to unusable in this case. Rather, the internals in that module offer ground lifts, transformer isolation, and a ganged "master out" control. Mind you, if you do work in a studio in some place that has balanced power, this can still have some uses from hitting its transformers with a bit hotter signal, which then gives you some nice, warm, "big iron" saturation.
Lastly, your bus boards should be the filtered variety. Not only does this help with external crud, these can help keep module leakage signals under control to some extent. Granted, if you've got one rogue module that INSISTS on dumping RF junk into the rest of the synth, they're not apt to deal with that...but then, if you've got a module that IS doing that, you should probably have it looked at or swap it out for a different one.