I can't afford either, but some big names in the industry (HOF names) use the Klaus and love it. I've been told that it does clean better than the AD, but honestly, how can you tell???? I agree that more AD's have been sold so far and that's why they are on the market used, but still very few. I can't afford either, so I'm making my own. It's been easy to secure the parts and it's simple to build out. What Hz is the Klaus or the AD? 60? 80? My total build out for a 60z system will be about 500 total. I will probably still get a vacuum cleaner used or a disc dr to dry the albums and also for in between cleanings.
I'd get the ready made machine IF I had the money AND more vinyl, lol...