I have a pair of Races, three or four years old (and I don't know if the design has changed in the meantime).
They're sure nice and light compared to other shoes. The crampons are smallish and while traction is good up and downslope it's lacking when I'm traveling sideslope. I've not had any durability issues. The harness isn't the easiest to adjust but seems okay with a variety of footwear.
Have never seen a pair of Runs, so I can't make a comparison, but the Races are my first choice unless there's a lot of fresh snow they'd disappear into.