This study proposes the hypothesis that the use of AI-based design sketch tools differs in terms of creativity compared to traditional sketch tools, such as pencil and paper. To investigate this hypothesis, experiments and surveys were conducted, targeting designers with experience using AI tools. In the experiment, both traditional sketch methods and AI tools were utilized during the ideation process. The AI tools were limited to ChatGPT 4.0 and DALL-E. The results of the study were analyzed using an independent samples t-test to compare the creativity scores between the group utilizing AI tools and the group using traditional tools. Additionally, the relationship between the designers' skill level and creativity scores was analyzed using Pearson's correlation coefficient, revealing a strong positive correlation between these two variables. The study concludes that AI tools have a significant positive effect on design creativity, enhance work efficiency, and reduce revision time. However, further discussion and analysis suggest that, while AI tools accelerate idea generation and productivity, they may lack the depth of thought and relational considerations provided by traditional methods, which necessitates caution.