The verdict
If you need a clean page today to test an offer or collect sign-ups, pick Carrd. The cost of a wrong idea stays small. If the site is a real marketing site, with several pages, a blog or case studies and a team that keeps changing it, pick Framer.
For most small B2B teams reading this, Framer is the better home, because a company site grows past one page quickly. Carrd still earns its place as a side tool for campaign pages and experiments. Be aware that a Framer site lives in Framer, and moving later means rebuilding. When a Carrd test turns into a business, plan the move early, before the page has real traffic.