whats good people

I'm looking into buying some software (in the 100 dollars) for my hercules rmx. I initially looked at deckadance, due to vst hosting, so I could play live on a midi keyboard for some local MC's I work with. I mix classical music.

Anyways what are the main features of traktor pro one compared/contrasted to Traktor duo TWO? Then compared to Deckadance.

I know we have a lot of Traktor fanboys here so try to be unbiased plz

tanks brahs