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No point in comparing them because Darkseid's Elite are a proper supporting cast that were given characterization in their initial appearances and have had decades more of fleshing out since then.
The Black Order are a bunch of henchmen that exist in the background of an already-overstuffed event and are only interesting because of their designs and powers. They're not supposed to be the court of Thanos's domain that have their own personalities and agendas, they're extra villains to help take up space in an event comic.
No one except for obsessive Hickmanfags or powerlevelfags remember the individual names of the Black Order, but Darkseid's Elite are characters with personality, motivations, and their own standing to exist as villains on their own, so you remember all of them.