I have heard both, albeit briefly.
The WP 7 will give you better bass.
It is not as demanding on electronics.
The Eidolon will give you better soundstaging and imaging.
It requires the best in electronics and powerful amps, as it is very revealing. (Room setup is a little tricky as well.)
Both are amoung the very best, and you probably would not go wrong with either.
My opinions of course.
The WP 7 will give you better bass.
It is not as demanding on electronics.
The Eidolon will give you better soundstaging and imaging.
It requires the best in electronics and powerful amps, as it is very revealing. (Room setup is a little tricky as well.)
Both are amoung the very best, and you probably would not go wrong with either.
My opinions of course.