First think to say, The Pioneer DDJ T1 is ship with the Traktor LE (Manufacturing Edition) wich is not eqal to Traktor Pro, if u want traktor pro u have to Buy the Upgrade (as Download)
The Sampler think is a little bit tricky, cause the "Lost sampler section" on the Pioneer DDJs design but you can Remap the Sampler by yourself on Traktor.
I Prefer the Pioneer DDJ - T1 + 1 Native Instruments X1
greets