The only things that might compare are cold finger modded DSLRs
Actually, I own a cold finger modded DSLR and I just placed my pre-order for an ASI 071.
Don't get me wrong, the cold finger has worked out really well for me and was a huge improvement over an uncooled DSLR. But the cooling is just not as efficient as a purpose-built cooled astro camera. The EXIF temperature reported is always quite a bit higher than my set-point for the cold finger, even though the cold finger temperature probe is inside the camera, fairly close to the chip.
Then there's the issue of data cleanliness. I'm told by some here on CN that DSLRs do apply algorithms to the data, even when you're shooting raw. An astro camera provides as clean as possible data from the sensor to the file.
And there's other ancillary issues. The shutter in a DSLR has a limited lifetime - none to worry about in an astro camera. A DSLR takes up more back focus, 55mm vs the 17mm of the ASI071. And with a fast scope, you can get mirror shadowing with some DSLRs. Plus, there's the added niceties of the 071 like the built in hub, tilt adjuster, desiccant, heated front window, etc.
Even though I have a cooled, full-spectrum modded DSLR, there's a lot to like in this camera. In fact, the only reason I went to the trouble of modding my own camera was that something like this was not available a couple years ago. To get a camera with a decent APS-C sized chip, reasonable pixel size, cooling, etc., you'd have had to spend over $4k before this camera. A self-modded DSLR was the only game in town for us mere mortals, unless you were willing to live with a significantly lesser chip.
So, even though this is similar in chip characteristics to what I already have, I'm looking forward to the serious cooling available in the summer months, the clean data path, and all the other convenience features the 071 has to offer.