ChatGPT is a general-purpose AI model that can generate text-based responses on a wide range of topics, while Roketfy is designed specifically for Etsy shops. Roketfy offers in-depth features for Etsy-specific SEO optimization, competitive analysis, product research, and customized content creation. Therefore, if you are looking for more specific and applicable solutions for your Etsy shop, Roketfy would be a more suitable option.