I have directly compared the Preciso to a Mazzer SJ on a Marzocco machine in a very good small cafe with 3 pro baristas, same beans, same machine. Our conclusion was that the SJ grinds were indeed a tiny bit fluffier and definitely better distributed but with careful technique and a bit more time spent on distribution (5-6 seconds tops) the shot quality was nearly identical. There was as much variation shot to shot with either grinder as between the two. In a commercial environment those 5-6 seconds per shot are critical, but not at home. Grind speed was also about a second or two longer per shot on the Preciso. The new gearbox on the preciso slows the burs down to the point where there is no heat problem. For press pot grinding the Mazzer simply didn't even come close, way more fines than the preciso and noticeably more sludge in the cup. There is a different commercial grinder in the shop that they use for pour overs and press pots, I can't remember the name of it but it was great at the coarse grinds and couldn't do espresso at all. My point is that high end commercial grinders were designed with a different set of criteria, and no barista would even think about using a preciso all day in a cafe, but for making a couple shots a day at home the preciso is 99% as good, a third the price, and a third or less the size, and better suited to different grinds.
That being said, preference in gear of any kind and what is "the best" is ultimately up to the individual users experience, and there are probably other grinders in the $1,000 and up price range that are better suited for home use than the Mazzer SJ I used. I have never had the opportunity to try Versalab, Malk K30, or the Elecktra Nino. I will therefore retract my "best at any price" comment and say probably the best under $1,500.
At the lower price end, I had a Mr. Coffee branded bur grinder that was I think $60.00 and still have a Capressio Infinity that is $100 (I leave that one for my roomate that likes dark oily beans that I won't let near my grinder) And while they are both way better than a blade grinder neither will do espresso at all, both leave a ton of fines at press pot, but both are ok at drip. I can definitely taste a difference in a pour over though, the preciso gives a much sweeter cup.