Just by this picture alone, they're all different. This got me thinking, so I did a quick breakdown of the Troopers as they get off the Shuttle Ramp
Trooper 1 "Benzi": Rank Stripe + Radio on the Right side of the Chest, Trooper 2: Chest Rig + Radio on the Left, Trooper 3: Different lower belt with no Chest Boxes + Radio on the Left (I think this might be the guy wearing a backpack?), Trooper 4: Chest Rig + Goggles + Backwards officer cap + Seemingly no Radio at all, Trooper 5: "Standard" + Radio on the left, Trooper 6: Missing Shoulder + Diagonal bag + Radio on the Right, Trooper 7: Beanie + Fanny Pack + Radio on the Right, Trooper 8 "Gharial": Chest Rig, Rank Stripe + Radio on the left
The same configuration doesn't appear twice. I think the best approach is to do what IOC did with their CRLs for a while: If specific accessories are chosen, the whole costume is to match the appearance of a character from an LFL licensed source.