amplified parts has the ones I like, nut goes on from the outside, just like on the ARC SP-3A that I have used them on.
I'd expect the gold finish to last longer on the Cardas parts than the shiny yellow metal that is on the PE units.
I've ordered both. Other than the color coding, I didn't really notice any difference either. The plating seems to wear the same. It's pretty thin on both.The only possible advantage is that the color coding of the channels is more distinctive. Otherwise they are identical.
Every connector and connection in the signal path can affect the sonics ...
The only question is, Will you hear it ?"
The next question is - Do you want to hear a difference? Followed by - Does it sound better or just different? After spending the money, most choose better.