Pick any socialist economy past or present. Argentina, Venszuela. Socialist light, France, GB, Spain. Slow growth, little inovation, poverty, stagnation, budget deficits. They are all mostly the same. Free health care that isn't there, but it's free if you can find it.
This is just semantics. USSR had an economy based on money. All socialist countries have economies based on money or some kind of vouchers. Trade is universal. Socialists economies just have more central control. They all have blackmarkets also because socialist econmomies are inherently inefficient. Instead of markets they have beaurocratic waste and corruption. Please study the economies of any socialsit conuntry. They are all the same.
"Capitalism is trading something for a higher value than it is worth." No. Someone produces goods or services, it is distributed and consumed in a continuous cycle. This applies to socialims also. The only difference is that Capitalism follows markets and socialism is centraly planned. Moda, you don't seem to understand the basics of economics.