Hardware.Info posted Netgear R6400 review: old dog, new tricks
A quote from the article:
The R6300 was the very first 802.11ac-router we got our hands on, back in the summer of 2012. Now it's been replaced, by the Netgear R6400 which we'll be discussing in this article. Not much has changed on the inside, but the outside has been completely updated. We took a good look at this new model.Netgear R6400 review: old dog, new tricks @ Hardware.Info
Netgear is making what seems like quite a remarkable move here - it's rather unheard of for a manufacturer actually replace a popular router, instead of simply introducing a new model on top of it and keeping both on the market without lowering the older model's price. That's wh the R6300 was easy to get your hands on until recently, and it's also why the Asus RT-AC66U is still readily available. The R6300 was actually upgraded in 2013, when a more powerful CPU was introduced to this model (a Broadcom BCM4708 instead of a BCM4706), but besides that it hasn't really seen any significant changes.