They might only be better in a "haven't had a chance to fail yet" way. And I say that as I endorse the cutting of Worley and Diamond.
Just base my opinion on watching them pitch. I don't think you can pitch worse than Worley. Batting practice was quieter. Gilmartin has better stuff and command. Johnson relived Diamond against the Mets ( with a couple of guys in between). The contrast could not have been greater. Diamond threw all his fastballs high and at 90. All his curves were in the dirt. Most of the outs he got were on over-anxious B-squad players swinging at bad pitches. A lot of long innings and wild pitches. Johnson threw a lot of strikes with his 93-mph fastball. Got outs with a sharp curve. His innings were crisp and short.