Wrong Target Reported (?)

The Technicolor TG800vac reports DISTRIB_TARGET='brcm63xx-tch/VANTY' which I understand refers to the MIPS cpu (BCM63168) as used in the TG789vac/TG799vac rather than the ARM cpu (BCM63138) as used in the TG800vac/DGA4130 (Ref).

The binary files and any specific hardware supported will not be compatible. Which files are compatible between these two installations?

config settings in text format and GUI source files in lua format (text).

The whole target 'brcm63xx-tch/VANTY' looks like something from Technicolor's proprietary repo, so I doubt that anything binary would be compatible. To my knowledge there has never been that target in normal Openwrt.

You should maybe look at the /proc/cpuinfo and clearly identify, which kind of processor you are running.
Example:

root@LEDE:~# cat /proc/cpuinfo
processor       : 0
model name      : ARMv7 Processor rev 0 (v7l)
BogoMIPS        : 6.00
Features        : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt                          vfpd32
...
1 Like
root@mygateway:~# cat /proc/cpuinfo
Processor       : ARMv7 Processor rev 1 (v7l)
processor       : 0
BogoMIPS        : 1990.65

processor       : 1
BogoMIPS        : 1990.65

Features        : swp half thumb fastmult edsp tls
CPU implementer : 0x41
CPU architecture: 7
CPU variant     : 0x4
CPU part        : 0xc09
CPU revision    : 1

Hardware        : BCM963138
Revision        : 0000
Serial          : 0000000000000000

Thank you.