The choice between DCEU and comic outfit is subjective. If you enjoy modern and sometimes reimagined versions of characters, the DCEU might appeal to you. But if you have a fondness for the original comic designs, comic outfits could be your preference.
The comic Flash typically has more established feats of speed compared to the DCEU version. However, different versions and story arcs can sometimes make the comparison less straightforward.
Namor isn't Asian in the comics. His character has been established with a specific ethnicity and origin that's not Asian. This has been consistent throughout the comic series.
Namor wasn't Mayan in the comics. His character has a distinct and established backstory that doesn't involve being Mayan. Usually, his heritage and roots are presented in a specific way within the comic universe.