Well, after reading this entire topic [not sarcasm\]
I can say it looks a WHOLE LOT like a Libby Carrier, in both versions.
Rhienland designs in Order ships would be rather bad, Rhienland ships are blocky and long, which would cause problems with asterioud fields, but I know what your gettin' at.
The one in the comparison pic looks the same length as a Kusari BS (heavy BS). The Order Carrier was supposed to be unique, like a one-two-three of a kind. But it got spammed. If the order DOES get a special heavy battleship, I hope its restricted or monitored usage of somehow...