What are you meaning by “hover”? All I know of is ga (a.k.a. the misnamed :ascii), which tells you the decimal, hex and octal for the Unicode scalar values, but doesn’t give you a name.
Oh, are you meaning https://github.com/chrisbra/unicode.vim?
Oh, are you meaning https://github.com/chrisbra/unicode.vim?
Other than this, the feature set is roughly similar. The biggest difference is that uni knows how to deal with emoji sequences.
Note: I'm only pointing this out in the general case of wanting a live search on some data, because uni and the provided uni.vim seem to be a far better solution anyway.