The amazing thing is that for the Chinese venue, the two have been dressed up as some sort of race cars for the road. Both have some sort of aftermarket quad sports exhaust setup and massive wings.
The exhaust looks like its from Irmscher, but that's not the interesting part. Both Buick have received a body kit that seems almost identical to the Opel Performance Center or OPC range. This is amazing considering the Astra OPC doesn't come in a five-door configuration.