The phrase "are more marked" is correct and usable in written English.
It can be used to indicate that something is more noticeable or pronounced in comparison to something else.
Example: "The differences in their performance are more marked when evaluated under pressure."
Alternatives: "are more pronounced" or "are more evident".
The gains are more marked in health.
Sexual differences among the siluriforms are more marked in the highly specialized families.
In the industrial cities with the considerable atmospheric pollution, these changes are more marked that the background ones.
Even without fever, infectious disease produces large disturbances in speed of cognitive processing, particularly that reflecting retrieval from memory, and these effects are more marked in older participants.
Our data show that the effects of chronic anabolic androgenic steroid exposure can be greater for adolescent than adult animals and are more marked in females than in males.
It is revealed that the balance between potential solar contribution and the need for heat storage are strongly influenced by these input variables, and the effects are more marked in recent, heavily insulated housing.
Young people in France, as in the United States, he said, see marriage as "a fundamental right" for same-sex couples as well as straight ones, while older people are "more marked by Catholicism and remain more traditional" in their views of marriage as an ancient institution that binds men and women and protects children.
Decreases in RSE vary from about 10%to35%35 % and are more marked with the greatest sampling effort, i.e., of 2000 pixels.
The female oldest old in China are also seriously disadvantaged in activities of daily living, physical performance, cognitive function, and self-reported health, as compared with their male counterparts; these gender differences are more marked with advancing age.
With SRSWOR the decrease in RSE varies from about 20%to75%75 % and are more marked for the P3 population when the y j s are maximally correlated with the x j s.
Ang 洪惟仁 (2003) used historical evidence to argue that the concurrence of intrasyllabic fricatives and nasals are more marked in Chinese languages in general as it creates inconsistency in stridency, with /dz/ being [+strident] and nasals being [−strident].
