Switched is way better if you ride technical stuff. It gives you the ability for better modulated control of the throttle by having a less active response. It also allows better use of the built in canam throttle smoothing in the throttle by wire program. For example bouncing on rocks while crawling in the "Eco" mode won't make you inadvertently bounce the throttle due to the bouncing of the vehicle, the "Eco" mode smooths this effect more than the "sport" mode. Every time I do steep rock crawls or drive rutted out technical terrain, I switch to "Eco" and power delivery is much more controllable with less modulation, not to mention easier on your belt and driveline. Try that in your kitty or Popo. I see it as a no brainier.
Edit- and by switched I mean a harness that utilizes the stick sport/Eco switch not those with another switch entirely.