I might note that, for the purposes of comparison, most (but not quite all) of the
FC Ship Card versions of the ships found in
ACtA:SF are available over in the
Commander's Circle section of the ADB website. (Only the Squadron Scale Ship Cards are relevant here; the Fleet Scale versions are abstractions of those.)
There is one thing which, I think, seems to be getting lost in translation, when it comes to discussing which aspects of a ship should remain consistent across games (to also include
SFB and
Starmada) and which should be up for re-consideration in order to better fit the game engine it's being deployed in.
On the one hand, there are certain things that are already up for removal between
SFB and
FC/
Starmada that aren't too much to worry about; a case in point being Klingon security stations.
In
SFB, the loss of these stations runs the risk of sparking a mutiny on most Klingon ships; in
FC and
Starmada, where there are no Klingon Mutiny rules, these boxes are deleted when Klingon SSDs are converted into Ship Cards. So it's no skin off anyone's back to see Klingons make do without security stations in
ACtA:SF.
On the other hand, there are a number of "core" systems, the "nuts and bolts" of a modern fully-functioning starship, that most empires (save for the most exotically alien ones, perhaps) are expected to have by the very nature of their designs. This is important not just in larger fleet batles, but in smaller solo or squadron patrols, where the ships are expected to be at least minimally capable in several areas, so that they can perform the myriad of duties their missions demand of them.
Things like cargo spaces (for those ships which have them; when they are, they are usually on there for a reason), transporters, tractor beams, probes (in most cases), shuttles, labs, etc. These are things which a ship may not need all the time, but which are a part and parcel of what makes them
ships, not merely glorified attrition units.
So, if a Klingon F5 has a tractor beam, two transporters, a shuttle, two lab boxes and a probe launcher on the
SFB SSD, it will have the same boxes on the
FC Ship Card, the same special notes supporting these features on a
Starmada Ship Card, and should have the same traits in
ACtA:SF.
(When it comes to Point Value adjustments, some of the
Starmada versions of the ships end up with divergent costs compared to what they have in
SFB or
FC; in that event, it's treated as part of the process of inputting the required variables into the conversion process, and seeing how a functionally-equivalent starship comes out on the other side.)
And in the case of the Kzinti DN, the reason for it having a large cargo bay is (if I'm not mistaken) because it's supposed to be able to carry a supply of replacement drones for the various ships under its command; so that it can help replenish their stocks when away from a friendly base in the interim (and in the absence of an allied tug or tactical transport) between specific encounters.