I've played both the Live series & 2K series for the XBox 360 and let me tell you, the difference between both games is crazy.
2K is literally better in every facet of the game, from rebounding, passing, post moves, etc.
I wanted to give Live a chance, and truth be told I was rooting for them. However, the product they put out is just not as good as 2K'.
2K = NBA
Live = NBDL
Don't make the mistake of buying the Live series, folks.