Just purchased and installed the Biobidet Slim Two model. My partner owns the DIB Special Edition. The hoses needed to be changed out with new to fit both toilet and water supplies. 

The Slim Two differs from the DIB in that it doesn’t offer a drying function. It also doesn’t seem to keep as much water warmed as the DIB. If I run two different functions back-to-back on the DIB, the water remains warm for the duration. The Slim Two water cools on the second function run. Additionally the Slim Two functions run for less time than the DIB functions, which I don’t consider an issue because I feel like the DIB cycles are a touch too long. 

Overall, for half the price, I like my purchase of the Slim Two as much as I like the DIB.