Curious if anyone has used a ZStage for their Preamp, then upgraded to the CSP3.  Was it “worth it?”  What kind of differences/changes did you hear?

I have a strictly Vinyl rig utilizing only headphones at the moment - Turntable - ZP3 - ZStage - Taboo MK IV

This system existed for a time without the ZStage in the chain - when I added it, it made the system a lot better.  I have been pondering whether or not to substitute a CSP3 for the ZStage.  The reason that I added a ZStage at the time was availability (used) and budget, but I am left wondering what I am missing, or if I would ultimately just be satisfied with the current ZStage setup.

Anyone take this route and have any insights as to the sonic benefits?  Happy that you made that choice?  I have to imagine that there are sonic differences, but would love to hear the opinion of anyone that has taken this route.

Thanks!