Both perform well and are important in their field. Etsy especially love their similar keyword feature which gives keyword ideas and lets you see whether it's ideal to target a keyword (shows you demand vs competition). Overall, it offers a great variety of features at a budget friendly price.
https://www.growingyourcraft.com/blog/12-best-etsy-seo-tools-honest-review-free-optionsThis might be helpful for you
Etsy search tools and Google Keyword Planner serve different purposes, so it's best to use them in combination for the best results.Etsy search tools Or Google keyword planner is enough?