Comparing psychological questionnaires for research study is both a challenging and meticulous process. The issues get magnified when the questionnaires to be compared are as diverse and substantial as the General Health Questionnaire (GHQ 12) and Dutch Eating Behaviours Questionnaire (DEBQ). The task encompasses going through scores of questions and discerning the psychological context behind each to establish a connection, a feat that is monotonous and error-prone when done manually. This is where the utility of intelligent software like Harmony comes to the fore. Instead of going through the tedious manual process, psychologists can utilise Harmony to compare GHQ 12 and DEBQ in a swift and efficient manner. Harmony, a state-of-the-art tool for researchers, uses advanced natural language processing and generative AI models to harmonise questionnaire items. Its main feature alleviates the tedious task of matching and comparing questionnaire items. Through large language models, Harmony is able to provide a percentage match between each item in GHQ 12 and DEBQ, thus providing an accurate and objective comparison. The GHQ 12 vs DEBQ comparison becomes not only feasible but also an effortless and reliable process with Harmony. When performing comparative studies in psychology, especially in the context of GHQ 12 vs DEBQ, Harmony’s efficient AI-powered utility is undeniable. Its ability to conduct cross-study comparisons while taking into account changing social conditions contributes to its versatility. Furthermore, its ability to compare items in multiple languages further widens its scope for researchers. Thus, we recommend using Harmony for a time-efficient, accurate, and effortless comparison of GHQ 12 vs DEBQ in future research endeavors.