L&LD
Part of the Furniture
In terms of options and design, or stability? Or both? I'm not one to care for advanced options... I usually leave mostly everything at default. I just want a fast and stable connection. So far the AC68U has been just that. However the Netgear is cheaper, and if it performs just as well (if not better) then I'm tempted to go with the NG.
As I also said, I'm also concerned about reliability. I plan on using this router for several years, just as I did with my ancient WRT54GL (which still works fine BTW).
In terms of being the most secure, with the most updated code running within the firmware and with the most chance that it will still be supported, particularly for security updates, long after NG decides it is 'stable enough' and decides to focus on their newer products.
And the features and options too.
Going forward, depending which NG you decide to buy, you may or may not have the option to install any third party firmware at all too.
Cheaper is for a reason, imo. If you want the best router possible over 'several years', Asus is the only consumer brand that I would trust.