When I decided to replace my SRAM force cassette with a new ratio, I opted to bling up the bike with a RED oil slick/rainbow cassette. At the same time, I bought the matching rainbow RED chain. The chain has performed great and I think it looks mint. Can't say if it's worth the premium over the Force chain, but for me, the look alone is worth it. Only minor bummer is that if you wax your chain like I do, the hollow pins fill up with wax.
The E1 chain seems to perform as well as the D1 with a little less weight. It is also much easier to find the quick link when you need to remove it.
The SRAM RED E1 AXS Chain is quiet and provide quick crisp shifting. Not much to add.
