I own 22lr's in 12", 16", 22", 24", and 28" and contours from sporter to heavy bull. My go to for walking around is the 16" sporter. Light, nimble, and deadly accurate. I've shot some very nice groups with it, but not as tight as my Lilja. For your purposes (pest control and informal target shooting) I wouldn't sweat the decision. Pick them up, shoulder them, and buy what feels good. Either way you go, you'll have a blast.
Thanks,
Cal.
Is that 16" sporter barrel in a 10/22 Compact by any chance??