The most significant difference between bug and defect lies in how they are discovered and the impact they have on the software’s performance. Bugs are often localized issues in specific parts of the application, while defects may be systemic flaws affecting overall functionality. Moreover, bugs typically occur during the development phase, while defects can be found at any stage of the software lifecycle, from design to post-release. https://testomat.io/blog/bug-vs-defect-difference-with-definition-examples-within-software-testing/