They have overlapping sets in that they are very intelligent. But Marko's metal manipulation is very limited, since he can only manipulate the material that he touches and not more than what he can drag under his own power. He has no way of flinging it around at range like Magneto or Ginger can, he can't fly and he can't use magnetism for energy output purposes.
But what he lacks in terms of raw firepower with just his powers he makes up with technology: his real power is coming up with and employing armor and weaponry that is far more advanced than what anyone else is able to come up with, when it comes to close quarters combat. An example would be that he has ideas on how to create a power suit that has technology that projects force fields to protect it, as well as plasma weapons that would cut through contemporary modern armor like butter.
The crux is that his power is a conduit that allows him the following: the ability to fabricate alien or advanced technology.
He specializes in force field shields and plasma weaponry, which is basically the technology he excels at. And because of his power-conduit, the technology he creates cannot be recreated by regular people, because Marko can manipulate two metals to bind together without having to be melted down and somehow fused to make a new compound. That means that Marko can't mass-manufacture his strongest weapons or armor, each being something he has to sink time and attention into. But it also means that no one else can use and create the biggest projects this metahuman can come up with.
Last but not least, he can come up with better vehicles than what we have on earth, but another "artificer"-like powered person who specializes in movement, mobility or vehicles will blow his vehicles out of the water.
Oh, and if there was an artificer that hyper-specialised in forcefields or in plasma weaponry, their creations would individually be more powerful than Marko's.