Preamp Output Capacitor: Mundorf Supreme vs. Supreme Silver Oil

Thank you for taking the time to answer the question. I'm just glad to see some folks take the time and the expense to experiment and share their results. Given that the results are system/circuit dependent, I guess I'll need to perform my own experiment, albeit an expensive one, and see how it goes.   
P.S. If I ever decide to get an MHDT Orchid, I know who to contact for advice or how to make it sound better. 

Ralph is far smarter than me and I would never argue with him 🙂.

A quality, educational discussion... Thanks. 

Audio research uses bypass caps and their products sound amazing. It must come down to personal preference. 

With my Rogue audio m180 darks they are traditional push pull transformer based tube  amps. I have tried both options, with and without bypasses. The coupling caps in my amps are 2.2 value and sound more open with greater extension and air with .22 value bypass caps added to the circuit. Without them it is more midrange oreintated and darker sounding. The treble stills sound clear and clean with good recordings, on my Revel 228 be speakers on the Chet baker "Chet" reissue you can clearly hear front  to back separation and his lips pressing against his horn without smearing, you can literally hear the brass instrument. Very clean and high resolution.