DumaOS has very specific gaming features though which makes it stand out as a very different router tbh. I'm using the XR500 now, personally I like its QoS much more that streamboost because its so much more flexible for my needs, I can change the upload and download of each individual device just by typing in how much bandwidth I want to give each device or adjusting it with the Duma 'petal' GUI also QoS on my unit is set set to come on only when I game, or stream once the session is finished it goes back to not using QoS which I prefer as I don't have a need for it as a always on feature. Gaming wise setting a limit for distance to who I connect to and what server I connect to and blacklisting ones I don't want is great with the Geo filter, which means I get to connect to gamers within a certain area as well as servers of my choosing for better pings, and a better online gaming experience.
The router has an auto update feature which is useful too and can be turned off should you want to manually update the firmware instead. As far as devices on the network map I can block individual devices for as long as I want, handy if you have kids or visitors you want to have more control over their usage. It has a DPI engine which the R7800 does not I believe, have which is part of DumaOS so it recognises certain traffic and the way I have it set up switches QoS on only when I game, or if my TV is streaming.
I actually get much further 2.4Ghz coverage than my R7800 but I attribute that to the R7800 ageing, the R7800 being just over two years old, it has been used hard and its performance has waned slightly over time but you cant defy the laws of physics and coverage is pretty much identicle.
The R-Apps are good and more are coming and it has a hybrid VPN so if you want you can separate which devices go though the VPN rather than all traffic. You can also set how much bandwidth to assign to all other devices globally and also help contol bufferbloat, once again this is done by typing it in or adjusting sliders, mines set to 80% of my bandwidth and shared equally to all other devices but giving a little more to my iMac and TV and PS4, you can turn that feature off and manually assign how much each device gets if you want as well. The Network map is much clearer in fact the GUI is great it shows devices that are actively on, and those not using any bandwidth in a separate part of the tree that shows all your devices, and it does not forget your settings in QoS like the R7800 does when powered down. I find once again for my own usage the QoS to be far more very granular on this device. Its a horses for courses router as some may find it a bit complicated and hands on I suppose initially, but it works well and DumaOS is more than an overlay and much more than 'marketing' with its feature set as I see it tbh but that’s just my take on the device. We all have different needs and functions for the devices in our homes so what fits one may not fit another.