Maybe is Aorus faster because little higher frequency but I'm sure that could be reached with Strix and good cooling.
I wound not payed same money I gave for Poseidon for Aorus.
Strix have nice quality PCB and ASUS component control.
For me is pretty much simple, if we talk about custom PCB than ASUS or EVGA.
EVGA is great. But if no available option for ASUS or EVGA than rather reference PCB NVIDIA.
I don't know why, but that's my feeling.
You must say how much is cheaper Aorus.
150$ more for Strix not worth.
I would suggest you if you can find for similar price ASUS COD RTX2080Ti Strix.
ASUS 2080Ti Strix COD 1665 MHz
Aorus Extreme have huge clock 1770MHz, depend of price she is very fast.
She can't be reached just like that with any chip.
Normal Aorus can.
That mean Aorus Xtreme worth buying, Aorus not.