that isn't unique, that's an orcish warhammer..
Err, not precisely.
It swings slightly faster, its basically a warhammer with a swing speed roughly similar to a long sword and it has a unique name.
Hence the term 'unique'.
Though, you'd probably know that if you read the UESP or actually got the weapon...

Its pretty decent at a lower level, but you're going to need something that hits harder later on OP.