In my opinion one of the strengths of the ENVE Smart system is that it’s sold as a rim. Our build includes Tune Hubs and Sapim spokes. The extra flexibility in buying a rim allows us to tune the weight and ride.
Unfortunately publishable direct comparison data won’t be available for a while if at all. I’d also be interested in aerodynamic data with rolling resistance figures, possibly the holly grail and probably too complex to test in a meaningful way to most riders.