Technically, knight armor is a fully airtight humanoid combat mech inside which there is an armored capsule where the pilot is lying with crossed hands. This is where the nickname of the knights - pharaohs - comes from.
Each knight's exoskeleton is a unique complex and in fact is a custom-made product. All of them are based on more or less common and trendy chassis, but with differences. Armor and weapons of each fighter, despite being assembled from the parts of same type, have unique designs created specifically for the user to ideally match his tactics and combat style.