1. Is the RX-A3080 even available?
It has been on backorder for a long time.
Assuming both are available, it depends on your preference on a few things.
A. Room Correction EQ. Do you care for it? Is it a must-have? If YES, the Anthem or Denon/Marantz might be better.
B. WiFi Remote App, Music Streaming App. Yamaha has the edge IMO.
C. Less Heat Production. Yamaha has the edge.
D. Reliability. Yamaha has the edge IMO.
E. Customer Support. Yamaha probably has the edge IMO.