The only thing this had to do with is what incentive structure each set up and what the expected outcomes of those are.
Leninism:
Concentrate the power into professional revolutionaries, a vanguard, to lead the people into making the "correct" choices.
Incentive: Keep this new and unprecedented amount of power indefinitely.
Outcome: Corruption of whatever ideals they might have had.
Capitalism:
Concentrate the wealth and thus power into businessmen/corporations with the purpose of keep accumulating wealth indefinitely.
Incentive: Use the power and influence of wealth to do just that, accumulate more wealth.
Outcome: Manipulation of rules, regulations, and the market.
This is what they are. This is what we've seen for more than a 100 years for both. This is what they are accountable for.