Cary SLP 98L f-1 vs Cary SLP 98L non f-1

I am looking for some feedback of Cary slp98 f1 vs slp98 (non f1). What does Cary audio have change to become f1? Is f1 better in soundstage?
I asked a Cary dealer about the F-1 upgrade on the SLI-80. And it involves an upgrade on some internal components such as caps, wiring, WBT connectors and a couple of other areas that escape me. Yes, soundstaging both depth and size should improve along with improved inner dynamic and detail.
I would ask your Cary dealer for more details pertaining to the model you are interested in.