The phrase "as more substantive than" is correct and usable in written English.
It can be used when comparing the depth or significance of two or more subjects or ideas.
Example: "In this debate, I argue that the evidence presented is as more substantive than the claims made by the opposition."
Alternatives: "as more significant than" or "as more meaningful than".
They think that Trumpism exists, and that it could endure as something more substantive than a political slur.
But Ms. Palin's absence created an opening for Representative Michele Bachmann of Minnesota, who is similarly well liked by grass-roots Tea Party Republicans — and whose supporters have sought to present her as more substantive and better rooted in policy than Ms. Palin is.
In her new book We Were Feminists Once, the writer and cultural critic Andi Zeisler calls this phenomenon "marketplace feminism," a convenient packaging that companies and celebrities can use to sell themselves as more substantive, woman-friendly, and change-making than they really are.
Tchaikovsky was "painfully aware" of this skepticism at home, Botstein writes, but also realized that critics abroad recognized "the apparent synthesis of a genuine national element with the presumed compositional norms of Western music" and saw his compositions as offering music more substantive than the base exoticism of works by his nationalist countrymen.
Hillary Clinton's platform is more substantive than that, as she calls for spending a billion dollars to better train police, legislation against racial profiling and dismantling the school-to-prison pipeline.
But the two wanted their project to be more substantive than the usual "gift baskets or something," as Andrea put it.
Constructive, nonviolent tension is as good a way as any to describe Obama's parrying of the blizzard of charges (some more substantive than others) hurled his way last night.
It just seems more substantive than a color".
But the role may be more substantive than it sounds.
