Quantum Science Audio Thread

I went back to the SR orange over the Light Blue in my Rogue RP 7 tube linestage. At first I thought the Light blue was better. Gave it a couple weeks. Switched the Orange back in. Much more sparkle and detail. Reinstalled the blue for a few days.  The Blue has a little more body but at the cost of resolution 

At first install I was surprised how good the Light Blue sounded. Usually fuses are rollercoasters the first 100 hours or so. Definitely a nice pace and very enjoyable. After a couple weeks I swapped the SR Orange back in and just more lively and better separation of the instruments. The blue sounds real good but in my system I prefer the SR Orange. You may like the Blue better. I’m 63 and I can hear a 12kz tone and that’s about it.  With the Townshend Podiums and a room that is at 30 db it is really easy to hear all changes in gear and add ons.
 I was thinking of trading up in the QS line. What improvements does the Yellow bring over the Light Blue?

‘Lumin U1 & Paul Hynes SR5 PSU. I am very surprised, but Yellow and Purple did not bring significant changes’

Thru my time of upgrading fuses starting with the Hi Fi Tuning Supreme and the SR reds I have noticed the Streamer is the least sensitive to fuse upgrades. 
Power amps and Pre’s make the biggest jump in my experience.