I’ve RO’d a decent number of matches.....many of them 2-day matches.
If I had the choice, I’d always choose binos over a spotter, simply from the eye fatigue standpoint. Swarovski often brought optics for us ROs to use at Core (now Altus). Their binos were freaking awesome. I have no idea what model they were, but they were high dollar and were actually a pleasure to use. I’m sure there are a lot of great ones out there, but the Swaros really spoil you.
Binos are much better at the end of a long day, in my opinion. Someone said above about using binos on a tripod being a possible issue, but that was never my experience. I really liked to use binos when I was on a stage where I had to transition between targets. I often found spotters to have too much magnification. I liked binos because they usually started at a lower magnification. The more I shot and RO’d, the less of a magnification whore I became. I will use them from a bench if I am shooting from one, just hate using them on stages. The only spotter I ever used on a stage that I liked was some kind of tan Bushnell (non angled) spotter that was physically small. If I had a choice for ROing a stage, it would be binos first, straight spotter second and angled spotter a distant third. I’m sure it’s a personal preference thing, but that’s my opinion.
