The previous models didn't support DFS in wifi 5ghz making them unable to work in high density wifi environments. Actually what's worse is that they randomically lose connection on a DFS AP (when the channel gets into one of the DFS-reserved ones they can't access). So you basically have to force them on 2.4 or disable DFS on the APs.

This applied to both the Broadcom and Intel wifi. Any chance these models are better in this regard?