I recently bought a Shure SRH440 and i'm relatively new to all this so i didnt know my mobile phone wouldnt be able to use them to their full potenital. Will buying a Fiio e11 amp help?

As the title says, I narrowed down to the two headphones. I will use them for casual listening and I mostly listen to beatles, led zeppelin, ac/dc and a lot of music from the 60s and 70s. Which headphone would be a better choice? I've heard a lot of good reviews about each one. Are the...