Amperex white label PQ 7308 in FS pres delux 2 ?

I was wondering if any of you have had any experience with this tube. I am considering these in my FS pres deluxe 2 linestage.
The stock 6n1p tube is good, but I was hoping to improve on things like imaging and midrange texture. Thanks in advance for any suggestions.
its a great tube. But for what they want for it its not worth squat. Let the pigs sit with it.
Yes, those are great tubes for the FS. I used them when I had my First Sound, but ultimately, I preferred the Philips SQ (Special Quality) E188CC / 7308.