I have both a Wildlife 1000 and R-10, Bought the R-10 becuase I was hunitng with a guy who ran 150-151. and frankly he had better dogs then me.. So I was alway running around with all my young dogs in my box looking for his dogs..
My personal experience..
Blue box is better for me, takes me less time to cycle through 4 dogs and figure out what the picture looks like, are all the dogs in the race?, did a Pup turn back?. where are they heading?? How fast are they moving out?. etc.
Hiking on foot, hard to beat the light weight advantages of the ICOM.. takes me a little longer, and I'm not as confident with it at distances.. but it normally gets me into hearing range..... Or zapping range!!!