next is primarily focused on the rendering layer, capable over static, server, and serverless rendering. it makes it easy to set up api routes but doesnt have any opinions whatsoever on data layer.

redwood is full-stack, has an opinion on graphql/prisma as part of your data layer, integrated into Cells for declarative loading states. its still super early days but you can feasibly view it as doing the same thing Rails does in terms of organizing and picking techs for you for all parts of a stack, including setting up scaffolding for you.