We're close. The Mets are averaging 4.76 runs/game; the Phillies 4.60. NL league average is 4.40. The difference is 0.16 runs/game.
Not quite as close with runs allowed/game: Mets are at 3.74, Phils are 4.02. League average is 4.39. The difference is 0.28.
Without going to the trouble of calculating standard deviations on R/G and RA/G, it would appear that the pitching gap is about twice as large as the hitting gap. Not large, in either case, but the Phils are a bit behind in both categories.
(Stats from baseball-reference.com.)