Well... from this review of your PX7...
The Bowers & Wilkins PX7 are headphones with a dark sound profile but are very well-designed. They have a sleek style and are comfortable to wear for a while. Th...
www.rtings.com
"Update 11/21/2019: We had previously listed the PX7 to have 61ms of latency with aptX(HD), as we thought it was aptX Adaptive showing up as HD on our testing rig since it is backwards compatible. This was a reading mistake, and the 61ms was an error, which was pointed out by a user. After getting this feedback, we remeasured the latency, with 3 different dongles, and got results around 220ms with aptX(HD). The PX7 still support aptX Adaptive but we don't test for this. The review and text have been updated."
220ms of latency... seems pretty much the same as the Sony... and the same as virtually every other bluetooth headset ... aptX is what gives you low latency - but that means a degradation on sound quality... better, again, to simply attach an audio cable.