@Tony So then to add the two extra nodes should I not spend the extra $50 and just get two more AV1000 as it is the same performance?

I have 2 PA7010P (AV1000) connected I get 50Mb of speed between them. I would like more... but it's better than wifi. I am interested in adding 2 more nodes and wondering if I purchase the TL-PA9020P...