Just comparing the current HC to the Loroi one. Essentially the same amount of S2S weaponry, but a disproportionate amount of PDS compared to the loroi. While being a lot smaller.
While all of the gear there is vastly inferior to the loroi it kind of shows a certain willingness of terran designers to push their power plants and whatever else to the limits. And cram whatever they can.
Another point to consider - a very large part of the terran armanent is kinetic based. Which points at relatively large necessary internal spaces to keep munitions. This once more brings up the size of the ship. The terran HC is smaller even with this in consideration. And that by as much as a fourth. The loroi is most likely broader as well.
Now just imagine what terrans would be able to do if they applied their design philosophies and couled it with loroi tech.
The higher quality of loroi PDS means that a ship needs much less of it which in turns frees up energy and mass capacity for more S2S armaments.
Further the fact that this vessel would be able to essentially eliminate all mass drivers in favour of energy weaponry means that a lot more space could suddenly be saved. This could be used to allow for more missile system stores which would allow them to have more tubes due to their energy efficiency.
Or considerably reduce the vessel even further.
Of course it's entirely possible that terran's would refine their weapon designs instead of fully adopting loroi weapon policy. A mass driver which can accelerate munitions to near C is more or less hard to distinguish from a laser based weapon in regards to aiming it, but can potentially be more deadly.
So to recap. Given loroi technology as well as the understanding of it, human design principles would most likely yield a ship that quite a bit smaller than a loroi vessel, while being more heavily armed. Not to mention the human ships seems to need less crew. Which points at more automation on the human ship. Shame the america class doesn't have a deadweight entry.

To be honest that's one point that I honestly don't fully understand. Why are the loroi crew complements so much higher than on comperable human vessels.