As far as I know its pretty much the same as TCAS but its the GPS must be on the traffic page or have a thumbnail view enabled on the map page. I will try to get the overlay on the map page next time I fly.
Its new to me so I haven't seen all the bells and whistles but the voice alert is the same as TCAS. Still has similar symbols as TCAS also.
There is a new antenna on the top of the cabin and a double antenna underneath, plus a processor under the seats.