What was the difference between lenin's nep and stalin's command economy?

For LENIN: 
Permits some private organizations, and workers claim arrive 
Awkward society with creation of the hands of the general population 
Way of life raises for some specialists 

While for STALIN: 
Needed to influence Russia into a modern power with all creation under government to control 
Made a charge economy 
Brought all agribusiness under government control, constraining workers to live on assemble ranches. 
Ways of life fell for some specialists

It is called "Motif".

Motif is a repeating component that makes conspicuous examples in old stories and society craftsmanship customs for example, the "loathly lady" who ends up being an excellent princess is a typical motif in old stories, and the man lethally charmed by a reasonably woman is a motif received from old stories in Keats' "La Belle Dame sans Merci".