not really IMO sony has a period of time they experiment O tunings, they sure changed a couple time, but you can just see their halo product to see the time period, ie R10, Qualia 010, now Z1R.LDAC won't change the FR curve of the XM4 to any significant degree.
For what it's worth I found the APM's background noise the least annoying of all the ANC over-ears I've owned in the last few months (including XM4, Bose 700, etc.), for various reasons.
The FR curve between Sony's products differs too much for the brand to have any "house sound" (same applies to most HP brands).
sony XBAs, MDR Z7s, Z1R, IER Z1R, etc they sure have an intentional tuning they have in mind, with varying degrees of success mind you but they have similarities.