Tough call.

Not sure why you want Ryzen, but if you do, I would pair that with an AMD video card. Remember that these AMD-based Auroras have not been around very long and use a completely different motherboard (with AMD chipset, etc.).

XPS-8950 is looking pretty good now-days. 

https://www.dell.com/community/XPS-Desktops/XPS-8950-Strange-online-config-options-for-Liquid-Cooler/m-p/8151963

and

https://www.dell.com/community/XPS-Desktops/XPS-8950-Upgrade-PSU/m-p/8151976/highlight/true#M69120

The 12700K uses efficiency cores and power cores, a new system that requires a new task scheduler under Windows 10, or Windows 11.

The Ryzen is a safer bet when it comes to compatibility. Ryzen will also generate less heat

Also, I don't know about the supported frequencies on the DDR5, but I know for the R13 it is locked at DDR 4,400 Mhz. It is also newer technology, and I usually tend to wait one revision before considering purchasing it.

In the end I am thinking the R10 might be cheaper, and I don't think you will be missing out on anything when you play Apex and Warzone.

Depends on what you want to do with it, but the R10 would be my choice. Just make sure you get liquid cooling and dual memory.

With both options I'd be getting liquid cooling and dual memory. 

What's better about R10 that would be worth giving up a newer CPU/socket and DDR5?

I'll just be playing Apex and Warzone and MAYBE some RPG in the future lol