Servers by jDrones

Here+ V2 RTK - Rover VS the new Here3 as Rover RTK

Hi
I’m trying to understand if I can use “Here+RTK Base Station” with the new “Here3 GPS model” as a rover model instead of the older and more expensive “Here+ RTK Rover GPS” https://baskaerospace.com.au/shop/gps/rtk-gps-module-rover/
In the product description [https://baskaerospace.com.au/shop/gps/here3/] it says that HERE3 is RTK supported , but than why still sell the older "Here+Rover RTK " and with higher price?
What am I missing?

Servers by jDrones