Title run in (not nearly as interesting as if Chelsea won):
1 Man Utd---34--54--82
2 Chelsea---34--40--79
Games, goal difference, points.
Remaining fixtures
Man Utd
A Everton
A Man City
A Chelsea
H West Ham
Avg. opposition placing: 9.75
Avg. opposition placing minus Chelsea: 12.33
Chelsea
H Bolton
A Arsenal
H Man Utd
H Everton
Avg. opposition placing: 4
Avg. opposition placing minus Man Utd: 5
Chelsea have to get 4 points, because they're never going to make up 15 goals in 4 games. Their fixtures are considerably harder than United's, but they have two advantages. One, they're at home 3 times compared to United who have a single home game left. Two, they have almost all their players fit whilst United are missing a good number, particularly in defence.
Using that stats site we can have a look at it taking the home and away things into account:
Man Utd
A Everton 43 28 29
A Man City 53 27 20
A Chelsea 22 26 52
H West Ham 87 10 3
Chelsea
H Bolton 75 17 8
A Arsenal 35 31 34
H Man Utd 52 26 22
H Everton 67 22 11
The first number is the percentage chance of Chslea/Man Utd winning that game, the second the chance chance a draw, the last the chance of a loss.
It's interesting, because whilst Man Utd have a better chance of winning against Everton than either drawing or losing, they're actually slightly more likely to not win than they are to. And that Man City game is close as well.
Chelsea have some pretty good odds, aside from the Arsenal game where effectively it could go any way. It's all down to being at home so much, but the points differecne really screws it up for them.
It doesn't necessarily mean much, but the average chances of them winning drawing and losing their remining games are:
Man Utd
51.25 22.75 26
Chelsea
57.25 24 18.75
And the same but minus the game against each other:
Man Utd
61 21.66 17.33
Chelsea
59 23.33 17.66
So the stats slightly favour Chelsea. However, they don't favour them to overhaul Man utd's total, just to close the gap before the end of the season.