These two teams have the opportunity to get away and get closer one another because in the rest of the season there are still burdens that must be completed. Manchester City and Arsenal also have a scheduled meeting that will probably determine whether Arsenal are really the favorites to win the title or maybe Manchester City will take it.
I tend to believe in Manchester City's good chances because after all Arsenal can still be expected to lose the other 1-2 match the rest of the season. As the team that has dominated the most titles in the last 5 seasons, Manchester City is my favourite, but this season's title race has been really intense between the two teams.
City are also more likeable to me, but they can also lose points, especially since they have done it very often this season, so Arsenal's chances look better at this stage. 8 points is a very significant advantage, and yes, City can reduce it to 5 points, since Arsenal played one game more, but this game still needs to be won. Newcastle are likely to move Tottenham from 4th place, the difference is only two points and Newcastle have two games in hand.