Dārā Shikōh (1615-1659), Mughal prince and intellectual figure of early modern South Asia, occupies a distinctive position in the history of religious comparison for his sustained engagement with both Islamic and Indic traditions. Non-dualism in Dārā Shikōh's work functions as a metaphysical horizon that shapes the practice of religious comparison. the paper shows that, while oriented toward the affirmation of an underlying unity, Dārā Shikōh's comparative project does not simply collapse Sufi and Vedāntic teachings into a single doctrinal identity. Non-dualism instead provides the implicit framework within which heterogeneous religious vocabularies can be placed in relation without being reduced or declared incommensurable. Within this framework, translation and conceptual alignment emerge as epistemically consequential practices rather than neutral or merely technical operations, shaping the conditions under which comparison becomes possible while preserving doctrinal difference. By shifting attention from the doctrinal content of non-dualism to its operative role in comparative reasoning, the argument advances a reassessment of Dārā Shikōh's project beyond syncretic or irenic interpretations. It suggests that the significance of non-dualism in Dārā Shikōh's work lies in how it informs the concrete procedures of comparison rather than in the formulation of a general theological synthesis.