SCD-XA9000ES v DVP-NS9100ES for SACD

I posted this question on AA, but got no reply. Has anyone compared the SACD sound of these two units, especially with video off on the 9100? I recently bought a 9100 through Audiogon to replace my DVP-S9000 -- which is headed to Sony Ladero for service. I wonder if it there would be noticeably improved sound with a XA9000, and whether it's worthwhile to look for one on Audiogon. I realize it should be a bit better theoretically, just wondering if anyone has actually compared the two, and if that theoretical bit is beyond a JND (just noticeable difference).