DMM dancer stat comparison:



waltz is the most attack oriented, marnie has the best overall boost (as well as def), while hana has the best range.
SAW waltz has 30% buff permanent, marnie SAW has (once again) the best overall boost, while hana SAW is a burst-heal dancer.
AW ability-wise, only marnie's is really worth anything: -1 cost to melee units when deployed.