Nice article. I don't have much experience with cross country skis, so I can't make a comparo, but I will say that my friend on XC skis was struggling to keep up with me on a classic XC trail in Indian Peaks, and I had the strange feeling that it would be very hard to get out of breath on moderate terrain with this setup. It was pretty clear that the skis were a huge factor, since he has a similar fitness to me. Specifically, the skimo race setup was clearly a better tool for the same type of terrain.
I've used Volle Vector BC skis for the last two years for the same types of rolling tours, resort skiing, winter bc, and spring ski mountaineering in CO rockies and WA volcanos, and for the type of skiing described in this article, hands down the race skis, with race boots/bindings and glidey race skins are better. If you want just a single ski for rolling terrain, as well as steeper stuff with varied winter and spring snow, then the BC is a good choice, but there are plenty of downsides. As a newly obsessed skier with the intention of skimo racing and a pro deal, it was a no brainer to expand my quiver of one. (I had a season ending injury, so no racing this year, but I'm crossing my fingers for spring).
Using a race ski (or similar) on rolling xc terrain is faster, lighter and more maneuverable, with better kick and nearly as good glide on most types of snow. And on spring approaches when the snow is still hard, skinning is a no brainer. On backcountry day tours in steeper terrain, you need to use skins on the way up anyway and if there's any sort of approach trail in, I would struggle on the way out, switching between making a few turns with a stiff boot, skate skiing and switching out of ski mode to kick and glide as my unwaxless friends would mostly just glide all the way back to the car. The wax pattern slows you down considerably on mellow terrain. I've skied laps at a backcountry slope which had nearly the perfect skin track for the waxless pattern, and using skins was still faster and more fun on the way up. Learning the art of transitions is well worth the effort. On sticky gloppy snow, the waxless patter, especially after developing some scratches, would pick up absurd amounts of snow, which lead to some awkward faceplants and frustrating tours. I had a ton of fun on the vector bc's, and as my only ski, they were just about the most versatile thing I could imagine, but if I had it to do over again, I'd buy either a race like ski to begin with or a superlight midfat (no waxless pattern) and save up till I could afford the other.