If we talk about the aesthetics of technology in Lancer, we can divide each of the Big 4 along lines of form and function.
IPS-N: Pure Function
IPS-N cares only what a mech does. It doesn't need to look good or pretty doing it - it only needs to be able to do that thing well. It's notable that the Raleigh, arguably the most form-oriented of the IPS-N frames, is also considered to be the company's biggest commercial failure - they strayed from their core design principles and got punished for it.
Harrison Armory: Form Follows Function
Harrison Armory still leans pretty heavily towards the functionality side of things, but it isn't satisfied with doing a good job alone. Yes, the mechs have to perform well, but they also have to look good doing it. There's no practical application for the Sherman's sleeveless coat or the Tokugawa's dainty little tassels, but they don't hinder combat functionality and they make the mechs look dashing. In comparison to IPS-N's coarse, industrial, almost unfinished look, HA mechs look stern, austere and imposing. There's a smoothness to them that you just don't get on IPS-N frames.
SSC: Function Follows Form
SSC is where we start to plunge into aesthetics-forward mech design. The Death's Head isn't six-legged because it's a sniper - the Death's Head is a sniper because it's six-legged. SSC came up with a mech design and asked: "what would this do best?" A six-legged chassis provided a more stable firing platform for precision weaponry, so that was what it did. Shapes and appearances are invented, and then a use case is discovered for them.
HORUS: Pure Form
It might seem weird to classify HORUS as "pure form" when their mechs largely don't have a consistent visual identity outside of the examples in the book. However, if we look a little deeper at the definition of "form," the explanation becomes clear: in some ways, HORUS is in the business of making statements, not mechs.
For anyone who's actually played a HORUS mech in Lancer, you may have noticed how awkward they are to actually pilot. Their statlines are, on paper, often very poorly suited to the sort of work they have to do. The Gorgon is built to attract attention and draw fire but has no armor. The Manticore is meant to be a front-line fighter but is quite slow. The Minotaur is meant to be a tech platform but has a low sensor range. The Pegasus' one functional trait doesn't apply to any of the weapons in its equipment package!
This is because HORUS mechs are designed purely as a testament to a certain discipline of technology. I remember expressing irritation with a friend's NeoGeo-for-X-Box emulator once, that you couldn't reconfigure the controller mapping so that it was easier to play with the X-Box controller. He remarked that it was meant as a historical preservation tool that perfectly duplicated the functionality of the NeoGeo, and that the only reason you could even play games using it at all is because that was a function of NeoGeo arcade cabinets.
That's how HORUS mechs are - their usability as chassis is broadly a side-effect.
