I've owned both and I definitely miss having the 6D II. There's a great comparison video by Jamie Windsor on YouTube. Essentially the only advantages to the 5D are 1) dual card slot, 2) silent shooting mode and 3) Magic Lantern.
The Canon EOS 6D Mark II outperforms the Canon EOS 7D in video capabilities, with a score of 57/100 compared to the 7D’s 43/100. Both cameras share some common specifications, such as Full HD video resolution and maximum video dimensions of 1920 x 1080.
Speaking of flash, the R8 has a maximum sync of 1/200s, whereas the R6 II is slightly faster at 1/250s. Another difference is the fastest shutter speed available: 1/4000s with the R8, or 1/8000s with the R6 II. Switch to the electronic shutter, and they both go up to 1/16,000s however. 6. Drive Speed.
uzH352.