Why should one choose Grails instead of Ruby on Rails (RoR)?
Ruby on Rails showed how frameworks based on simple principles can dramatically improve developer productivity, creativity, and lowered maintenance costs. Grails has significantly improved upon those principles and brought the productivity of Rails to the de-facto enterprise Java stack, which is based on Spring. Grails adds essential enterprise features like transaction demarcation support, conversational state, and appropriate object to relational mapping for legacy systems, without compromising on the deployment aspects and by protecting the investments made in server software and developer skills.
