Obviously, everybody has seen Avengers: Age of Ultron by now, so there will be no spoilers in here "“ still, if you haven't seen the Quicksilver in this year's Avengers you best look away!
Obviously, this is a comparison between the two Quicksilver versions that we saw on the big screens, the one delivered by Marvel and the one delivered by Fox. And while, in these movies, one is called a mutant while the other a miracle, we know that they are about the same"¦
With a few nuances. And that is why one of the two versions is actually a better portrayal of Quicksilver.
Quicksilver, according to Fox

In X-Men: Days of Future Past, the studio decided to rehash the character's origins and present him as a silver-haired American, living with his mother and two sisters. Obviously, this means that Fox may have already lost some ground.
About the character's personality, Fox decided to make him actually quite charming. Furthermore, another trait is added, him being actually undisciplined and pursuing only his selfish purposes. As a matter of fact, he decides to aid in Magneto's jailbreak just because it was a something that nobody did before.
Furthermore, this character is pretty experienced as far as his powers are concerned.
However, Fox has the right on other mutants, so this version of Quicksilver is actually the son of Magneto, as hinted in the movie. Furthermore, the scene in which the speedster is seen in action is, well, the highlight of a film filled with awesome action sequences.

