Hey I know people are going to rib the OP about how it can't sound better, but I've been thru this, and yes it is possible....
What happens is this, you sit a listen to a piece of music a million times wihile you work on it. You become ever so sensitive to every little detail. Then an update comes along and it all sounds better. Why? because the DAW is performing better. Midi is a little tighter, the compressors and verbs sound smoother, the audio engine is more effiecient.
Now you wont hear the difference once the music is rendered and is outside the DAW, but I am convinced it works/sounds better.