Worth to upgrade my Audience aR6-TSS to aR6-TSSOX?

I’m using Audience aR6-TSS power conditioner for a few years, in general I’m very happy with the performance. Now I can upgrade this gear to get a brand new aR6-TSSOX by paying about US$1930. However, I’ve compare it side by side at the same time, the sound quality is not that big between aR6-TSS and aR6-TSSOX. Have you compare it as well? Is it worth to pay this money upgrade to OX version? Need some input, thanks!