First and foremost, as you heard, the CCR2116 enjoys the existence of a 16-core CPU with the advanced ARM 64bit architecture, continuing the new-gen processing of powerful predecessors such as MikroTik's RB5009UG+S+IN and CCR2004-16G-2S+. According to MikroTik, the CCR2116 seemingly, and we quote, "eats ... for breakfast" other Ethernet routers for fun in a number of areas, especially when it comes to single-core performance.
Moreover, this new Cloud Core Router, as the name suggests, comes with 13 1G Ethernet ports and 4 10G SFP+ ports. Putting aside the fact that this collection of ports offers users a great deal of flexibility and freedom for network design, they are working alongside a 16-GB DDR4 RAM!
That's right, a total of 17 ports supported by a 16-core 2 GHz CPU and a 16-GB RAM!
As you can see in the image below, the four SFP+ ports are connected to the CPU via a separate full-duplex line.
As for the Ethernet ports, 12 of them link to the CPU in 3 separate groups of four, eliminating any bottleneck. As for the last Ethernet port, it is directly connected to the CPU for lightning-paced management.