Not really no, I think the thing you are missing is the key point of Socialism that seperates it, that is the workers own the means of production, now usualy this is done by the state, however the state under Socialism is run by the workers and for the workers, in essence it is owned by the workers.

The thing with the market is that it is incredibly inefficient, yes with market socialism you can plan it to an extent but it is less able to adapt to the plan, and more importantly it is unable to meet the needs of the workers. If I plan an economy, I can set needed staple goods at a large loss, and make up for that with luxury goods or with exports to Capitalist nations. In a planned economy the workers, through the state has FAR more of the ability to run its own affairs.

We can see this effectivness in capitalism, I cannot remember the company, I want to say it was Sears who decided to make their internal devisions run through a market system and it immediately started to fail, however we see Walmart, Target, Amazon, essentaly every big company internally plans there company, because it is SIGNIFICANTLY more effecent.