Is ActiveResource the ideal REST framework to create a REST api? [ Edited ]

[pvisintin]

REST is gaining a lot terrain in the interoperability on the Web. ActiveResource was proposed as default by Rails, but now we can find libraries like Roar[1] that seems to be lighter and simpler than Ares and moving out from ActiveRecord dependency on Ares. Is the ActiveResource based on ActiveRecord abstracion a big advantage?

[1] Roar: https://github.com/apotonick/roar#readme