Got an amplifier pc board with 75 ohm cable type F fitting to receiver with
50 ohm bnc chassis fitting.

I'm going put the 75 ohm type F on one end of my 10' coax interconnect, and
a 50 ohm bnc on the other end of my 50 ohm coax.

An alternative is to use 75 ohm coax, and mis-match the other way. This
would put a 75 ohm type F fitting on a 75 ohm piece of coax, with a 75 ohm
bnc hooking up to a 50 ohm bnc chassis fitting on the receiver.

Which combination will give me the least loss?