Objective: The purpose of this study was to extend prior findings concerning differences in the three commonly used Spanish versions of the WAIS-III. Specifically, the focus was assessing if scores differed across the Mexican, Puerto Rican, and Spaniard Similarities and Digit Span subtests and across individuals born in Mexico and Central America. These subtests were used because they differed the most in previous analyses. Method: In a 3x2 factorial repeated measures design, the three Similarities and Digit Span subtests were administered to participants in a counter-balanced fashion. The sample consisted of 16 males and 33 females between the ages of 21–62 with 0–17 years of education from multidisciplinary medical and community facilities. Of the participants, 71% were born in Mexico and 29% in Central America. Results: Significant differences were found for Similarities between all of the three-paired comparisons, with the Mexican versions yielding higher raw scores. Yet, no significant differences were noted for Digit Span and scores between birthplaces for any version on either subtest. Conclusion(s): The following should be noted from these results: First, because 71% were Mexican-born individuals, it was expected that they would outperform on the Mexican version. Second, because the Digit Span subtests are identical with regard to items and the instructions given are minimally different, no significant findings were expected. Third, though no significant findings were found between scores across Mexicans and Central Americans, it is important to note that idiosyncrasies or demographic differences across both groups could account for non-significant differences.