From a quality, performance, and efficiency standpoint, I can fault neither the rDNA nor the SXmini. However, I strongly prefer the feature set of YiHi's new board over that of Evolv's. Aesthetically and ergonomically, the mini wins for me hands down. I'm honestly not trying to participate in a "My vaporizer vaporizes better and more stylishly than your vaporizer!" argument, I'm just relating my personal feelings for these two devices, having spent a generous amount of quality time with both of them.
I'm absolutely positive that there are many vapers who, upon experiencing what each of these devices has to offer, would prefer the rDNA. If we all liked the same thing, everyone would be producing the same thing and we wouldn't have the choices we're blessed with today.