Can't compare it to Berserk?
Boy becomes uber fighter by joining a mercenary group very young because bad shit happened while he was a kid. When older the hero is out for revenge (big-style) and fights lots of massivily over the top bad-guys usually with lots of gore and flying limbs. Art work is detailed with loads of blood & dismemberment etc etc. Did I mention the revenge part yet?
Nope, no similarities to Berserk at all.