You may be right when you Said that arsenal is always superior, that's considering their past record. but I want to tell you that things might work different for them this time. Because chelsea is not always that easy to be defeated more especially when they are playing with bigger teams like liverpool, manchester city, arsenal, manchester united, this above mentioned teams don't always defeat them so easily.
When it comes to football, anything can happen, but we should know that Arsenal is having higher chances of winning the match. The match might be a difficult one for the two teams, and even if Arsenal will be winning, it’s going to be with a slight goal margin. Chelsea are currently fighting to qualify for the champions league, and Manchester city playing draw is an advantage to Chelsea, their points difference is going to increase, so they will do everything possible to get a win against Arsenal in their next match, even as it’s going to be difficult.
Premier League matches are different from what we see from other league matches like the matches are becoming more interesting than before and the chances of predicting the possible outcome of the matches this season is more difficult than before, by performance this season Arsenal is in a better position to win against Chelsea but seeing how they struggled to play Manchester United in their last match shows that any team in poor form can get a point when they play against them. Arsenal has already secured their slot in the champions league competition next season and Chelsea is looking for a way to find themselves in the top 4 so they will take the make more seriously because losing in the game reduces their qualification chances. Chelsea will need to win against Arsenal but that will not be easy unless Arsenal gives them the chance as they can make terrible mistakes when you expect them not be more careful.