The Q are little brats and quite powerless when it comes to the beings in the Perry Rhodan series.
To quote wiki:
To all life, an evolutionary theory called the "onion-shell-model" is employed. It states, that there is a continuous evolution from lower life-forms (bacteria) to higher life-forms like intelligent life and finally bodyless entities. Upon invention, the onion-shell-model was used by the authors as if there are definite and discrete stages in cosmological evolution. However, later in the series further life-forms, representing stages between the known shells, were introduced.
The main shells are:
intelligent species, that have contacted other species
cosmocrats/chaotarchs (high powers)
The Q would be merely a superinteligence species, cosmocrats and chaotarchsare a few whole levels more powerful, they rule EVERY universe.
As for technology, Rhodan's humanity itself has ships of immense power, a single one of those that can totally wipe out the Borg without breaking a sweat, or being in danger for one second.
I don't know, the Q probably in the Rhodan high powers category..their power ranged from the beginning of the universe to some realistic speculation on the future. Still, I have problems with intelligences/powers than range through multiverses...the physics involved are likely a limitation on such species.
When speculating on the future, I try not to go as far as including such all-powerful entities, though I don't mind speculating on hyper-advanced species within the technological realm.
Like the Culture, most stories written with species of such powers have to be done so with them on the periphery, otherwise its hard to write any drama in them..same with species even on the Borg level, at some point you have to de-power them in some way or reduce the threat, or you can never use them.
I've read most of Perry Rhodan up to the 2035's (took years o_O) and there's no comparing the Q with a Cosmocrat, they're so vastly beyond everything humans can even imagine that they can't usually directly communicate a life form at human level, they'd have to create a sort of avatar for that which is by all means still more powerful than anything else in the universe(s).
Santaman, the fact that the Cosmocrats can't communicate directly with humans is a limitation, NOT a strength.
I'm sure it was introduced for the Perry Rhodan Cosmocrats in order to make them cool and mysterious; but this came at a price, depowering them.
The Q, on the other hand, have no problem directly communicating with humans, despite themselves being beyond human understanding.
The Q would be a super intelligence level species at most, but they're, from what we've seen in Star Trek, too limited in what they can do, the SI that keeps an eye on us humans has an influence sphere that spans the local group in this and other universes and controls several dimensions attached to these universes.
TV trek didn't go too deeply into describing the Q.
The trek lit line made it pretty clear that the Q are part of the ruling class of the multi
verse, not limited to its iterations that include the federation's known history(ies).
Its powers aren't displayed in the ways the Q, they're much more subtle, but on occasion they do things like absorbing an entire species to save them from extinction, also they're not beyond creating pocket universes and planets as they see fit.
And now, the Cosmocrats rarely use their power.
Any practical definition of power has to include not only the capability to do something, but the will to do something, as well. Apparently, more often than not, the Cosmocrats lack the latter.
All things considered, when comparing the Q and the Cosmocrats, the Cosmocrats are the ones found lacking.