I never compared, I know one group who did, they rated it as Allnic 5000, Ypsilon, eclipse, in that order. I have compared Allnic and IO eclipse, and heard Ypsilon separately without any compare.
Given the questions you are asking, for people like you and me, flexibility in a phono is important for learning. Phonos like Ypsilon which are more inflexible, are for people who already have done the rounds and know what they need to optimize their system. Plus, you will have to put up a lot of money to try multiple carts on an Ypsilon
Dctom bought the Ypsilon after comparing it to the older Dartzeel and to thoress