It depends on the task. If your Rails app hits the database a lot, memory availability and disk speed will matter a lot, which favors the new Linode style. If y

It depends on the task. If your Rails app hits the database a lot, memory availability and disk speed will matter a lot, which favors the new Linode style. If your app just does one small query per page and then gets on with its work, then probably CPU is your most important thing (since most of your time will be spent on app logic, runtime housekeeping and rendering templates).