My god, less thinly veiled insults please people. The battleship looks more like the gunboat (without wings though) + RM BS shape wise. It still looks Hessian. Read below for a detailed analysis on why:
It doesn't need to look like the Odin to look Hessian, and in fact it probably shouldn't look like the Odin. The Odin was not designed with aesthetics in mind, it was meant as a frame with as much high powered stuff bolted to it as possible. Think technicals in the mid east, except with supercharged engines, better armour on the cockpit and highly destructive guns. Having a battleship with a light frame like the Odin's defeats the point of having a battleship. The Red Hessians are miners, space factory workers, former factory/mine shaft slaves and military defectors. They are engineers trained in the art of practicality and utilitarianism. For small ships they will go with a design that will be most suited to the environment they are fighting in - in this case fast, easy to construct. For big ships they will do the same, and use a design that works. In this case, the frame configuration would probably be almost stolen from the RM BS to make the battleship as hard and easy to pile armour on as possible. It makes sense that the battleship would have an RM BS feel, because lets face it they likely designed it using:
plans from the RM BS adapted to the Hessian environment (so some balance between metres of armour plates and size usable in the Omega systems) considering the Hessians also have people who defected from the Rheinland Military, including some engineers who helped make the Thor design possible (See Thor infocard).
their own way of designing ships which is having as much high powered stuff bolted to it as possible, hence the forward gun. Not a backward gun, because that would imply that the battleship is meant for tactical retreat. Forward gun, because it is meant to stand its ground and pummel the enemy as they close in.
As any medium BS, it is made for group tactics. And the reason it is made like this is because this is what was asked, because it seems most in line with Hessian design principles. So blame me if you must, but like I mentioned a few pages ago in this thread the capital ship design would likely NOT be a bigger version of the fighters, but be more based around a blockish design that is so typical to Rheinland.
One final thing: the two circular things on the back of the Odin are not there "for show" or to be symbolic. They are meant to be reactors (tokamak pattern). This is fine on the Odin which is supposed to be small, fast, easy to construct, and is supposed to evade most of the shots fired at it - a fighter. Making reactors of this size (why not use several smaller ones which would take less space and be harder to nullify all at once?) and this configuration on a capital ship only creates an easy target that can be blown off by the enemy attacking from any direction and leave the ship floating powerless in space. I'd figure a faction of miners and engineers would figure that out and change the design accordingly so that the reactors aren't such an easy target...