What makes it worse is that the Sontarans are quite well known, as they appeared quite frequently in Doctor Who's 80s seasons.
They might as well have just copied the Daleks or Cybermen.

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What I really don't get is how the Breen design got green-lighted in the first place. Most designers (and the production's lawers) try their best to avoid designs that are too close to those that already exist. Like how the original "Linear Falcon" was considered too similar to the Eagles from the then-recent TV series Space: 1999 to be used for the Millennium Falcon, so they finished the model to be used for the less-prominent Rebel Blockade Runner (which is only in about 3 scenes in the first 5 minutes) and made the current Falcon design (which was also a rush job).
Now, if they gave the Breen suit goggles instead of the visor, everything would be alright. But no...
