Are they at the same size than the warmaster figurines ? Do they mix well with them ?

I don't know where to start in warmaster (as I want to start all the armies ) so I thought about buying this box first. But the GW website says they're 6mm, which is smaller than warmaster ...

The ideal would be a picture of some of the BoFA miniatures next to warmaster miniatures, but I just need to know that they're okay to play warmaster with.