The main difference between Figma and AdobeXD is their approach to vector graphics. Figma focuses on browser-based vector graphics editing, which allows multiple people to access and collaborate on the same design in real-time. AdobeXD, on the other hand, is designed to make designing for mobile and web apps simpler by providing various tools and templates to quickly create wireframes and prototypes. Additionally, AdobeXD has more integration with Adobe's other products while Figma lacks in this area.

For more information, you can check out this feature comparison between Figma and AdobeXD [https://www.which-app.com/app/figma/adobe-xd].