The Fusiliers paint their combat machines with red highlights around the lower limbs, hands and feet--a somber reminder of the deadly game they play against other MechWarriors and the blood already on their hands.
Per FM:Capellan Confederation, page 108.
The Sentinels' insignia is a granite statue of a BattleMech on a green field, with red and orange sunset rays behind it.
The Fusiliers' insignia is a roaring grizzly bear against a green field.
Per FM:Capellan Confederation, pages 107 and 108.