The R6 Mark II Is a No-Brainer. It's a Write-Off.

The R6 Mark II now has the head detection, all that from the R3. It's not extravagantly better than the original, but it's going to hold its value longer. If you buy two of the same bodies and you run them into the ground, you've spent $12,000 for those two bodies. You start fresh with a new body. The moral of the story is if someone is debating between an R6 or an R4, my big concern is maybe you're not making enough money as a photographer.