Exosuits are often civilian frames that act as a relatively light suit of armour that increases most physical traits, mainly used for construction work.

---

Power armour are full suits that are bulkier but provide a far higher level of functionality,
protection and firepower. often used by military ground forces, bodyguards and police.

---

Mechs are mainly used due to their main functionality in any environment. They're often deployed in cities or in space to provide support in construction, do on demand large-scale scripting, or provide defence.

Mechs typically look like scaled-up anthroids, with the cockpit being hidden somewhere inside the upper torso. Usually with a detachable pack-slot to carry equipment, extra mobility devices, smaller vehicles or in one case an entire city.