Also UT is still very white, but has been growing more diverse, especially in terms of Hispanics. Ironically though, the “whiter” side of SLC is more liberal than the areas with Hispanic influence, largely for cultural reasons.
Religious reasons, primarily. The Hispanic areas are less blue because the Whites there are LDS, while those on the east side are not.
There is a cultural divide, though. The most notable thing about it politically is that Herriman (far southwest of the valley) is one of few places in the state where non-LDS Repblicans exist in large numbers, and is as a result of that by far the most Trumpist place in urban Utah.