Cannot help you with the comparison but on my X-250 the Elrod EPS Sig 3 was the best cord that I tried on it. Sold it before the current like of EG cords came out.
IMHO The Ultra Khan is not really the best choice for Power Amps.
I have a Krell KSA 250 and I use Shunyata Anaconnda Power cords with it.
My Ultra Khan's are used with my Hydra 8 /Digital Components.
I still believe Amps like the Pass and Krell require large current flowing power cords.
Never owned the Elrods but I thought about buying them several times. I believe that the Elrod and Electraglide are kinda made from the same type of design.
Ozzy's got some good points here.
And yes - the Elrods are a similar ribbon conductor design as the E'Glides. David Elrod used to work for/with Scott Hall.
I own several of each brand, running an EPS-3 Sig on my BPT line conditioner and Mini Khan Plus on 3 different monoblock amps. But, I haven't compared other cords on the amps, so Ozzy and Bigkidz would have a better perspective on that.
But which EG's and Elrod's?
Are you comparing apples to apples?
I have read in numerous posts that the newest top-of-the-line EG's (mini_Khan Plus, Ultra Khan, Epiphany, X, etc.)are are much more transparent and not as warm as the top-of-the-line Elrod's.
I hesitate to even mention, much less recommend, EG's because of Scott Hall's miserable reputation, but I have his cables and I find them to be excellent.
Using Electraglides on front end for best transparency and sense of openness; using Elrods from wall to conditioner and from conditioner to amps for body, power and full-range dynamics. This combination works very well in my system.
From a customer service perspective, David Elrod is as good as it gets and will bend over backwards to be helpful. A truly great guy to work with. I would just call him and ask your questions.