I don't buy into the notion that one can actually feel differences in ride quality with a few more or less spokes. But more spokes allow the use of lighter rims with no loss of strength. If I have a choice of allocating the same amount of steel among more lighter spokes, or fewer stiffer spokes, I'll go for more spokes every time.

Also, since you're in Colorado and mentioned that these are climbing and descending wheels, then IMO you're making a good case for more spokes because it will mean improved lateral stiffness. This isn't a ride quality thing, but can reduce the risk or brake rub when the bike is heeled when climbing, and improve the feel of steering precision on fast corners.