Difference between Bluesound Node 2i and Cambridge CXN v2

From above post on 6/2 by adg101:
 If you decide on the CXN, spend a little extra to upgrade the power cord.

I'm bit of a newbie to audiophile gear, tho I've had NAD equipment for 20 years.  I just got a Node 2i and was surfing and seeing comments about SQ improvements achieved with after-market power cables - well, being a bit of a skeptic I found this a bit hard to swallow - who can clarify this power cable business for me?
Thanks/Bill

wgosma,
So I did not think that power cords cord make a difference but I took a chance and upgraded to a power cord for my Krell Integrated Amp and my Cd Transport and have heard a remarkable difference in the sound.  Gonna do my Phono stage as well.
Worth trying out!!

I changed out the PC on my Vault 2 and it made a noticeable improvement.  Built my own and took ten minutes.

@wgosma: Opinions vary on the efficacy of aftermarket power cords. My advice to anyone who asks is to investigate them only after you are satisfied with every other part of your system, with emphasis on the speakers, room acoustics, and electronics.