This study examined the effectiveness of a business English presentation course enrolling 24 participants, including 18 undergraduate students and 6 full-time employees from a retailing company. A 7-week workshop alternated weekly between (1) conventionally prepared presentations created through manual drafting and visual design, and (2) GenAI-enhanced presentations developed with tools such as Google NotebookLM and Napkin AI. The study explored whether learners’ performance varied across these formats and how their perceptions of presentation learning shifted over time. Data sources included performance assessments conducted by an industry HR manager and the instructor using a shared rubric, pre- and post-course questionnaires on confidence and perceived learning, and post-course interviews on the strengths and challenges of each preparation mode. The findings indicate limited differences in overall performance, with English proficiency serving as the strongest predictor. GenAI-enhanced presentations offered notable advantages in efficiency and visual quality, while conventionally prepared work better supported idea development, negotiation, and collaboration. Rather than competing approaches, the two formats functioned as complementary pedagogical pathways that cultivate presentation literacy, workplace problem-solving, and authentic communication skills.