Hi, I decided to buy two peelers. And after a week of use, I can share my impressions. Please, do not judge strictly, this is my first review :)
I was initially interested in extraordinary round form of Joseph Joseph 3-in-1. But then it turned out that it does a great job, cleans easily and safely. It's a little easier to peel apples and other round fruits, compared to peeler with a standard handle. It also does a nice noodles. Joseph Joseph is conveniently disassembled for cleaning in the dishwasher. But still has shortcomings. This peeler is not very well suited for continuous operation. Because of its shape, insufficient size (too small and narrow) and slippery material hand begins to tire quickly enough. And then noodles turns out not so beautiful as before. As a result, we have a very interesting concept, but with some minor flaws.
As for the second peeler from Deiss, I have not noticed the large differences in the quality of peeling and julienning. It is easier to clean, you just need to hold the peeler under running water. Not be amiss to keep on hand a cheap brush to occasionally clean out the remnants of vegetables stuck between teeth. Traditional peeler's handle seemed to me still more convenient than peeler of round shape. Your hand is not so much tired and peeler does not slip in it. So you can get more job done.
Both peelers are great products, with own advantages and disadvantages, but in the last week, I noticed that mostly use peeler from Deiss. I really like it.