nordost baldur sc's, ic's

Sorry. I'm new to this. Is there a big difference amoung the ic's and sc's as you go up in the norse line? I found them to be better than the blue heaven and red dawn. Thanks.
According to Nordost, there is a big difference between the entry level Baldur and the next up level, Heimdall, which is the first level to use the Monofilament (?) technology of the Valhalla. So, they recommend to start with the Heimdall. I have the Heimdall speaker cables and they are great.

I also have the Frey interconnects which are great also, and IMO, a bit better than the highly-regarded SPM.
I would want the one with the smoother presentation. Sounds like Baldur, as long as I dont give up too much bass