I see no reason to buy this over the Alienware AW3423DW. The AW is slightly better in almost every respect (though the differences are mostly negligible) for the same price.
The real advantage of the AW is the warranty process. They don't repair anything; if they cant solve the issue over the phone with a few silly suggestions, they will ship a new replacement panel (you keep the stand) overnight - no credit card required. Then you pop the old panel in the same box and slap on the pre-paid shipping label. No on else does this. Free shipping both ways and a zero dead-pixel policy is killer. I doubt Philips comes even close.
I do think there is a typo in this review. On page five, you are showing the Philips as only achieving ~419 nits in HDR, while the AW3423DWF isn't much better. Yet, the AW3423DW (the AW3423DWF's sister monitor sans Gsync Ultimate) is over 1000 nits?
Something's off...