It's usually the main-line soldiers where you end up having to repeat stuff. That can be kinda annoying, so having another version in there can be nice. And that's just what we have with this month's exclusive miniature from Games Workshop. Head to your local GW store and pick up the new T'au mini and coin this month only.
From the post:
With the new Codex: T’au Empire on the way, the fleets of the Fifth Sphere Expansion are preparing to set out once again and claim more territory in the name of the Greater Good. Although they’re quite happy to talk you into it, they also carry rather fearsome guns, so it might be best to show them you’re already onside with this month’s commemorative coin.