I think it is.

First and foremost, the Hyperdrive technology in the Star Wars Legends universe was discovered in 36,000 BBY, allowing the sentient races of Star Wars to spread rapidly across the galaxy over the next 30,000 years, eventually populating the galaxy with a hundred quadrillion beings.

Meanwhile, in Dune,humans only achieved a reliable method of traveling through the stars 10,000 years before the story begins, that is, byfolding space using the spice from Arrakis. Even so, they depend entirely on the Guild of Navigators and the Spice to do so, while in Star Wars, even common ships have the ability to jump through hyperspace and traverse the stars.

Now, considering population, we don't know exactly the population of the Dune universe, but Paul Atreides, in his Jihad with the Fremen, causes the death of 61 billion people, which is treated as a big deal. Meanwhile, in Star Wars, the Galactic Empire kills 100 billion Geonosians, the Yuuzhan Vong Invasion causes the death of365 trillion across the galaxy, and just the planet Coruscant has over 1 trillion inhabitants. In episode 7, the First Order destroys Hosnian Prime, which is an ecumenopolis, so it can be deduced that there were at least 100 billion living there.

Logically, it would make sense for the Star Wars universe to be more populated than that of Dune, after all, they have a much more reliable, stable, and distributed method of interstellar travel. Additionally, they had 30,000 years to populate the galaxy, while the humans of Dune only had 10,000. Perhaps the Star Wars galaxy simply has more habitable systems than the Dune universe.

what do you guys think?