Background: Attention-Deficit/Hyperactivity Disorder (ADHD) has attracted growing attention in software engineering as part of the neurodiversity movement. However, limited empirical research has examined how ADHD affects developers’ everyday work and cognition. The study Get Me in the Groove provided initial insights by identifying distinct cognitive and behavioral patterns among professionals with ADHD. Objective: This paper presents an external replication of the quantitative phase of that study, conducted in Brazil, to test whether its findings hold across different sociocultural contexts. Method: The same survey instrument was applied, translated, and adapted to Brazilian Portuguese, yielding 68 valid responses (41 ADHD, 19 neurotypical, 8 other neurodivergent). Data were analyzed using the Mann–Whitney U test, suitable for ordinal data and small independent samples. Results: Significant ADHD neurotypical differences were observed in Memory, Time Management, Abstraction, Distractions, and Communication, with medium to large effect sizes (r = 0.34–0.60). Constructs such as Inertia and Dislike for Routine Tasks showed no significant differences. Conclusion: The replication supports the robustness and cross-cultural validity of the original model. Findings highlight the importance of inclusive practices such as visual planning, task segmentation, and structured communication to support cognitive diversity in software engineering teams.