No there has been reasoning that leads us to assume there are no other classes, but we do not know for sure. Likewise, there is not one decent bit of evedence that says the Eisen is a vesuvius all we know are 3 things: 1. it has more than one wing of fighters. 2. It carrys Vampires. and 3. It isn't a midway. These leave several options for what it could be. 1. A vesuvii 2. an older carrier that has been retrofitted for its squadrons to be grouped in 2 different wings. 3. It is an as of yet unseen class of carrier that was made during or after the war, with most evidence pointing towards the war era. these are the options as to what it could be, we can not be sure that there wasn't another class of carrier that confed made during the war, that was a heavy carrier, that there was at least 1 that survived, no where does anything say, "the only carriers left were Concordias and Rangers" also since the confederation dreadnoughts carried 120 fighters, those fighters were originally organized into 1 wing, but they could have been reorganized, during the ship's most recent rehaul (1 day in space=1 day in dock from Fleet Action) into 2 wings of 60 fighters and pilots. And yes the Eisen could very well be a Vesuvii, I am not counting that out, but there is anti-vesuvii evidence that is just as circumstantial as the pro-vesuvii evidence. 1. With tolwyn gone there was a low likely hood of more Vesuvii being made since he was ramrodding the project through the assembally. 2. There is a naming convention amount Vesuvii and that is to name the ships after mountains/volcanos, all 3 confermed Vesuvii are named after mountains/volcanos.
I shall repeat my self once again that while I am not sure what type of ship the Eisen is, I will not discount the strong possiblity that it is a vesuvii, i just shall not and never shall assume anything based purely on circumstantial evidence that in no way proves anything besides that the ship is not a Midway, that it carrys fighters that are COMMONLY assigned to heavy carriers, and that it carrys at least 2 wings of fighters. Wait a tic here we don't even know the Eisen carried more than 1 wing of fighters, perhaps it was going to be resupplying itself at a base where it had access to a new wing of fighters to take as replacements and it sent it's long wing to the Midway increasing the types of ships that we have seen that it could be to the following: A Concordia, A Bengal, A Confederation, A Ranger even, A Durango (perhaps confed didn't sell every one to the BW), same type as Armada Lexington, or any type of capship that we have not seen yet. While getting rid of your only wing is not too tactically strong an idea, it could happen.