1. The Costumes
2. The Jokes
Avengers: Age of Ultron is funny, a lot funnier than expected and a good handful of those moments are delivered from Quicksilvers character. A bit loose and sarcastic, his simple "didn't see that coming," became an on going joke throughout the film. Quicksilver in Days of Future Past however, is down right hilarious. With what felt like 5 minutes of screen time (but I'm sure it's closer to twenty,) his interactions with Wolverine and Professor Xavier are some of the best parts of the film and the comment he makes about his father is hilarious to any comic fan. This one goes to Peters.
3. The Plot
Lastly, and most important, is analyzing the role they played, which is a bit complex. The two characters are vastly different, existing in different universes and interacting with different teams. The Quicksilver in X Men:DoFP, is a young kid in the 70's, living at home with his sister and mother and is a known trouble maker. The Age of Ultron version is a war torn orphan who, along with his twin sister, aids Ultron in his plot to make the world a better place before realizing just what's at stake. One of the biggest differences here is the fact that Scarlett Witch does not officially appear in X Men: Days of Future Past, nor is she the same age as her brother. He also plays a much smaller role as opposed to the Maximoff twins, who played an on-going role throughout the second Avengers film. There's also an obvious difference in speech patters, one being from America while the other was from Eastern Europe. Unfortunately, Evan got the short end of the stick in Days of Future Past, but was such a hit with the audience that his character is reportedly being brought back for the sequel, X Men: Apocalypse, in 2016. For now, Quicksilver's role dominates in the lengthy Avengers sequel takes this one.
Bonus: Special Effects
While Age of Ultron featured some amazing action sequences, Days of Future past will hold the title of having one of the absolute best slow-motion sequences in film history. If you haven't seen it, take a look below!