Script change is a branch of language planning and language policy. To assist language planners and policy makers with their endeavors, I have performed a Qualitative Research Synthesis to determine if the Han’gŭlization of Korean and the Romanization of Turkish are two distinct models of script change and if one model is more useful than the other. After describing language planning and policy making, I define script change, operationalize the terms used in the field, and discuss its history, its causes, and factors. Then, I explain the methodology and detail how I use it. Next, there are case studies of the language communities which exemplify the two models of script change: Korean representing the evolutionary one and Turkish the revolutionary. Following that, there are selected studies regarding the status of each script change. Current research on Korean asks who should receive credit for the revaluation of Han’gŭl; for Turkish the concern is national identity reconstruction along neo-Ottomanist lines. The data extracted from the selected studies are used to identify themes and sub-themes for producing a synthesis and a comparative analysis. My conclusion is that the answers to my questions are in the affirmative: the two models are distinct, and one is more useful than the other.