I believe the R7800 is far more mature in terms of stability and usability. The only problem I've had with it is latency spikes (discussed by others here: [SOLVED] Router (Netgear R7800) introduced latency spikes >100ms). It's not really been noticeable for me, but I suppose this has to do with the fact that I don't use that many latency critical apps/services.
2 Likes