The study reported in this article compared two different inductive instructional methods implemented in a Business English writing training, including paper-based instruction (PPI) and product-based instruction (PDI). It assessed the effectiveness and examined practical issues of the implementation of each method. A total of 46 Thai students majoring in a Business English program at a Thai university participated in this study. The students were randomly divided into two groups and put into either the PPI or PDI training module. The researcher collected data from direct observations, focused-group discussions, and students' writing scores. Qualitative data from the focused-group discussions and observation field notes were analyzed thematically using the grounded theory, while cross-examination was utilized for students' writing scores. The study results indicate that the fundamental dichotomies between both approaches include tangibility, authenticity, and contextuality. Students' difficulties in formulating grammar and writing rules on their own and students' perception of learning as a burden were found as challenges in both modules. The findings also indicate that both the PPI and PDI modules trigger classroom dynamics and a positive atmosphere; however, PDI resulted in more vigorous dynamics as student movements and interactions were relatively higher. Finally, this study's findings are beneficial for instructors seeking innovative instructional methodology to improve their Business English writing teaching. The study has contributed to the field of teaching Business English writing. The study's findings have helpful implications for lecturers of Business English writing, who are looking for a teaching approach that enables them to create opportunities for students to learn in authentic, professional environments, contexts, and cultures cast in real-life business situations.