Huawei router vs Awesome router: what's/where's the difference?

Hi I have a Huawei HG659B and we have max 5 devices connect at the same time, 99% of the time only 1-2 are using the net. All use AC 5GHz band wifi. All devices are 2x2 AC devices. All within 5 m of router.

I am tempted to get the Asus RT-AC68U ... awesome router. But where's the difference there? If it was only me doing heavy browsing say 100% of the time, will I notice a difference?