EVAL DEMORAD Anthenna options??

Hello, 

We are about to purchase DEMORAD but the following question appears:

- On the following web page : 

https://www.analog.com/en/products/adf5904.html#product-recommendations

On video named "24GHz Multi-channel Radar and Sensor Solution" and "24 GHz Radar Provides Safety via Obstacle Detection and Ranging"

we see different front-end compared with https://www.analog.com/en/design-center/evaluation-hardware-and-software/evaluation-boards-kits/eval-demorad.html#eb-overview

It seems that there are 8 RX channels.

It this correct and where we can find some info about those 2 different options?

Regards,

Ilian