Grandstream adaptor choice

#1

Which one should I go for - Grandstream 802 or the 812. Pricewise, they are similar.

812 states - “Includes a built-in NAT router which can handle routing speeds up to 100MBps” Not sure what this means.

#2

812 have 2 lan port WAN/LAN (with router)
802 have only LAN

#3

Good. Any preference between the two please?

#4

Your decision, normally in home no need for WAN/LAN