Armand L. Mauss compares Latter-day Saints with Catholics and Protestants and finds that they are slightly more racist than some, and slightly less racist than others.
Armand L. Mauss, "Mormonism and Secular Attitudes toward Negroes," The Pacific Sociological Review 9, no. 2, Autumn 1966, 92, 99
A comparison of Mormon responses to those of the Catholics and of all Protestants combined, shows that the Mormons are consistently more likely than the Catholics and somewhat more likely than the Protestants to give anti-Negro responses (Table 1). [6] However, this same conclusion would be true for the Lutheran and Baptist groups represented. Furthermore, a comparison of the Mormons with various additional Protestant groups, such as the Episcopalians and Presbyterians, shows that the Mormon anti-Negro tendencies are exceeded by those of other denominations on several items.
It would seem, from the data presented here, that the "null hypotheses" must be allowed to stand in the case of the religious variables for no systematic differences in secular race attitudes were found between Mormons and others or between orthodox and unorthodox Mormons. In most of their responses, Mormons resembled the "moderate" denominations (such as Presbyterian, Congregational, Episcopalian), rather than the "fundamentalists" or the sects. To be sure, Mormons did differ among themselves in the tendency to hold negative secular attitudes toward Negroes, but these differences were not so much between the orthodox and unorthodox Mormons, indicating that controlling for the factor of urban origin leaves orthodox Mormons no more anti-Negro, and perhaps less so, than their orthodox co-religionists.