Adjudicators are far more devastating than ogrovs against highly fortified planets...the actual disadvantage lies in their cost and fleet supply...
For a human player, ogrovs are clearly superior...but in the hands of a high level AI (where cost and to a certain extent, fleet supply are pretty much irrelevant) the adjudicators are far more problematic because they will quickly destroy all your support structures...
If given enough time to prepare, usually you can amass enough scouts + fighters to take out all enemy ogrovs before they kill your SB...adjudicators however will likely destroy most if not all of your other defense structures...in either case, the SB survives long enough for you to destroy all the anti-module ships, but with the adjudicators you've lost all your other structures while with the ogrovs that is not always the case...clearly the ogrovs will have done more damage to the SB before being destroyed than the adjudicators ever would have, but against ogrovs you have much better odds of maintaining other structures like factories, point defenses, and repair bays that may aid in the survival of the SB...
For worlds with SBs and few other defense structures, ogrovs are the best choice...but against planets with many defense structures, adjudicators are much more useful tactically...for human Advent players though the shear cost and fleet supply of adjudicators does not justify their existence, which is why a cost or fleet supply reduction for the adjudicator would be preferable to an increase in resiliency or damage output...