dcherkus@dmin:~$ gnuradio-config-info --version
3.10.9.2
dcherkus@dmin:~$ gnuradio-companion --help
usage: gnuradio-companion [-h] [--log {debug,info,warning,error,critical}] [flow_graphs ...]
GNU Radio Companion 3.10.6.0 This program is part of GNU Radio GRC comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to redistribute it.
Both programs have the same date stamp and are the only ones installed (I never install the Debian packages).