I have both, use both and love both. But they are different animals. I use the duality as a brutal fuzz or a creamy fuzz. It cuts through just fine!!
The Doom, I use with other effects, as it stacks very well. I use it as a stand alone, as a less aggressive fuzz, so it is there but stands out better
If I had to say which one cuts through best, it depends on how U set them. The way I set them, the doom cuts better.
BUT, it is how I use them. The duality can cut through just fine,