RAK7289V2 16 channel LoRa Gateway OS SW/FW

as far as i understood from documentation this GW in a 16 channels version is based on two Semtech SX1303.
Both Semtech Packet Forwarder and Basic Station seems available. Which of these sw (packet forwarder or basic station ) can be suitable for 16 channel ?

Also is RAK packet forwarder and Basic Station the original Semtech software or it was been customized for 16 channels management ?

I would like to evaluate this GW for a potential customer that require 16 channels but they ask for original Basic Station or Packet Forwarder Semtech SW

Thanks in advance