Not really within the HDR10 modes. They both have the same challenges with brightness in their peak 1000 mode discussed hereI bought the Alienware but going to return as brightness isn't great. I hear the Asus has much better brightness.
[Update 2] Testing 'HDR400 True Black' and 'Peak 1000' Mode Brightness on New OLED Monitors - TFTCentral
Testing the common HDR modes on new OLED monitors to figure out which mode is brighter for HDR and for SDR content
tftcentral.co.uk
If you’re after brighter HDR, the Gigabyte FO32U2P offers that!
Gigabyte AORUS FO32U2P Review - TFTCentral
The new 32" 4K 240Hz QD-OLED monitor from Gigabyte, featuring the first proper, full-speed DisplayPort 2.1 connectivity support
tftcentral.co.uk