Let's remember that this comparison is going to be heavily affected by the DVD-A and SACD players that you're using to make the comparison. And even with universal players, it's likely that the same manufacturer might do a better job with one or the other format. So I think it's really hard to judge which format is better.
I have a Linn Akkurate player (basically the same at their Unidisk 1.1 w/o the video section) and before that a Linn Unidisk 2.1 (which sounded great but was unreliable supposedly due in large part to difficulties integrating the video section). In both of these players, I do agree that some DVD-As sound better to me than some SACDs, but I haven't done more than a couple direct comparisons. My general sense is that the DVD-As often have more detail but the SACD have a more relaxed and natural sounds. Whether this is due to the way the 2 sections of the player are implemented or to differences inherent in the 2 formats seems impossible to say.
I have a Linn Akkurate player (basically the same at their Unidisk 1.1 w/o the video section) and before that a Linn Unidisk 2.1 (which sounded great but was unreliable supposedly due in large part to difficulties integrating the video section). In both of these players, I do agree that some DVD-As sound better to me than some SACDs, but I haven't done more than a couple direct comparisons. My general sense is that the DVD-As often have more detail but the SACD have a more relaxed and natural sounds. Whether this is due to the way the 2 sections of the player are implemented or to differences inherent in the 2 formats seems impossible to say.