Difference in sound between Siemens e88cc and e188cc?


Interested in user experience with the Siemens e88cc and e188cc. In my rig the Siemens e88cc offers great detail, clarity, imaging, nauturalness and dynamics, but is far less tonally saturated than the Amperex e88cc. Is the Siemens e188cc (forget CCa -- $) better in that regard? How do the Siemens e88cc and e188cc differ in sound?
pmboyd
PS. Yes, I've looked at Joes Tube Lore and VTV, etc. Interested in expanded commentary and user experience.
HI,
E188CC round getter sounds more like Amperex (USA).
A Frames sound more like Cca with more speed and closer to Voskhod 6323P mid 70's.
petg60... please elaborate. Does the Siemens e188cc have the same great clarity, detail, imaging, naturalness and dynamics as the e88cc, but a more saturated tonality, similar to Amperex? I find the e88cc seductive, but somewhat astringent. 
E188CC is a better tube overall more dynamic better bass with a more vivid presentation. All the positive traits of e88cc with more effortless sound and quiter. Soundstage is wider.
I dont find e88cc astringent or sterile if that is what you mean but E188CC has a fuller character.
petg60... Can you offer a comparison of the Mazda/RTC e88cc/e188cc with the Siemens and Amperex equivalents?