I've owned both the Ruger #1 and browning 78 single shots
both are very high quality and potentially very accurate rifles.
I've had marginally better groups with the rugers, I've owned,
but both will produce 1" hundred-yard groups with tailored ammo
I personally like the looks of the brownings a bit better.
youll do great with either choice!
heres a few pictures off the net, showing rifles very similar to those I own
my brownings been rechambered in 300 wby
the ruger rechambered in 257 wby