Reddit reviews The Revolution Betrayed

The major advantages of a socialist economy are the elimination of overproduction as well as giving complete information to planners. Capitalism has to struggle with overproduction and incomplete information as a result of them operating as competitors. That's the major difference.

Industrialization under the czars was not really qualitatively different from Stalin's industrialization except for the fact it was extremely patchy, concentrated, and relatively marginal; as well as the fact that the industrialization was almost exclusively to build up military capabilities. And yes, I'm aware it ruined much of agriculture. That was relatively intentional, the motivation for the 1932 famine was to export grain in return for rapid industrialization. Which he succeeded in.

I'd recommend you read The Revolution Betrayed, and The Contradictions of Real Socialism to understand the actual problems with the Stalinist socialist model.