Here is the metadata file info copied and pasted from the 6.4775 (Z8H) firmware.
ota-property-files=payload_metadata.bin:3796:114396,payload.bin:3796:1353333519,payload_properties.txt:1353337373:156,care_map.txt:802:241,compatibility.zip:1096:2653,metadata:69:685
ota-required-cache=0
ota-streaming-property-files=payload.bin:3796:1353333519,payload_properties.txt:1353337373:156,care_map.txt:802:241,compatibility.zip:1096:2653,metadata:69:685
ota-type=AB
post-build=Sony/BRAVIA_UR3_UC/BRAVIA_UR3:9/PTT1.190515.001.S76/647741:user/release-keys
post-build-incremental=647741
post-package=0FA70A0BA0AB_00004300_16047751000616
post-sdk-level=28
post-security-patch-level=2020-05-01
post-timestamp=1595234666
pre-device=BRAVIA_UR3
Here is the metadata file info copied and pasted from the previous 6.4770 (X950H) firmware.
ota-property-files=payload_metadata.bin:3796:114448,payload.bin:3796:1351602815,payload_properties.txt:1351606669:156,care_map.txt:802:241,compatibility.zip:1096:2653,metadata:69:685
ota-required-cache=0
ota-streaming-property-files=payload.bin:3796:1351602815,payload_properties.txt:1351606669:156,care_map.txt:802:241,compatibility.zip:1096:2653,metadata:69:685
ota-type=AB
post-build=Sony/BRAVIA_UR3_UC/BRAVIA_UR3:9/PTT1.190515.001.S71/647701:user/release-keys
post-build-incremental=647701
post-package=0FA70A0BA0AB_00004300_16047701000615
post-sdk-level=28
post-security-patch-level=2020-03-01
post-timestamp=1589941130
pre-device=BRAVIA_UR3
You can see the model number listed in both firmwares as BRAVIA_UR3. This is the model code for the X950H. Again, the firmware can be installed on the X950G, X950H, and Z8H without any issues happening to any of the 3 TVs. For anyone wondering as well, these these are the model codes for the TVs as identified by the firmwares when installing updates.
BRAVIA_UR1_4K = X950G (first revision)
BRAVIA_UR2_4K = X950G (second revision)
BRAVIA_UR3 = X950H