I can't remember if I had the Akras on my bike when you delivered the binocs to me. I have Akras and I think you would be happiest with them over Remus.
Akras were designed for the K1600, Remus is a generic design meant for many bikes.
The entire Akra slip on is one piece, and is an exact and easy fitment. The Remus coimes with the generic can, and then a separate pipe to fit from the headers to the can.
The Akra has a carbon fiber cover over the pipe forward for the muffler. The Remus has no heat shield, just the bare pipe.
The Akra retains the "6" theme with 6 outlet tips on the muffler. The Remus, being generic to many fitments is a single outlet.
Although some photos I have seen of the Akra does not show it, they do come with carbon fibre cover on the back of the muffler (over the 6 outlet tips).
I know you also shop Revzilla, and that is where I bought my Akras. They had the best price, when you include shipping.
2012 K1600 GTL
1973 R75/5 restored