Both cards should have nearly identical performance frame rate and rendering wise.
But, both cards have their pros and cons
At a higher price, the Strix is known to have a cooler, and quieter cooling system while the Aorus is known for it's unique ability to change between 2 hdmi ports + 2 display ports or 1 hdmi port + 3 display ports.
Though I've never owned either card, I think the Auros is more worth the money from the research I've done.