I got thrown for a loop tonight. Using the Skipjack, now it's the ECD-1 that is sounding more forward. Weird. I'm using the SRM1/MK2 as the amp now, so that could account for some differences, but the mids on the ECD-1 seem to outshine the North Star pretty easily. Volume matching could be an issue here.
Regardless, the ECD-1 is doing better with vocals, especially female. The mids just sound great. Better than the north star. And while the ECD-1 sounds just a bit more congested than the NS, I think that may be due to the more forward mid presentation, which seems to de-emphasize some of the more complex musical passages. However, if you listen enough, the ECD-1 still gets it right. It seems that the NS designers chose to give equal prominence to both. A matter of taste perhaps. The NS might be a little blacker between the notes. And the ECD-1 still has the more lush sound. This is not to say that the ECD-1 is forgiving in the mids. I'd say defintely not.
The ECD-1 seems to do a better job (by a fair amount) with female vocals, and that is important to me. Some classical tomorrow should make this even more difficult. For now, advantage Electrocompaniet.