the OP question presumes one is a "good" gun and the other is "unreliable and/or untested" crap - not hardly
nobody with half a brain carries unreliable crap
never carry a gun you haven't proven to yourself the old fashioned way
But extreme few shooters I have ever known, who own more than 2 or 3 handguns, carry their most difficult and priciest to replace gun. They all tend to own multiple very reliable, very functional, and plenty accurate handguns.. some prettier and pricier than others.
Race guns and carry guns may be one and the same, but they do not have to be.
Even "beater" truck guns need not be throwaways. LEOs manage to struggle on by somehow or other with highly reliable std model non-custom "service" pistols. Some of us civilians can do same, and some of us cannot. Ain't anything pretty about a Glock, but they do tend to function.
There are a lot of old "beater" Colts and "police trade-in" S&Ws that are almighty reliable and deadly accurate. Why exactly should I carry my extra nice purchased NIB way-back-when S&W 66 vs. my "used" musta' been a cop gun carried a lot but not shot a lot k-66, (some nicks, stains, etc. but functionally flawless), when I have run well over a thousand rounds thru both of 'em and cannot tell the difference between 'em in hand, looking at the sight picture, and punching groups ???
or that Rossi sixgun that throws 'em thru the same holes and goes bang every time, even if it do get knocked around a little whilst riding with me in truck, vs. them that don't ride along "just because".
Service guns need not be match guns or race guns, that's merely optional.
Race guns are quick, match guns are accurate, but not all are as 100% reliable as service guns. Good service guns are always reliable, that is the prime definition of 'service'. Anybody who admires and understands the flexibility of the 1911 platform ought need no explanation of that.
If you carry only Les Baer and Hamilton Bowen, color me envious.