F1 2014 Quick question about research and development in F1 2014?

[ClaudioRos]

I'm about to start a career in F1 2014, I've never played that mode because I only raced online. Does research and development work for the other cars? I mean, in F1 2016 the others do develop their cars, is it the same in F1 2014 or will Ferrari be always slower than Mercedes if I'm not racing for Ferrari for example?