The Virginia plan was to give the larger states more votes. With more say in the government, meaning the larger states would have more power than the smaller states.
The New Jersey plan was focused on insuring that small states got an equal share of representation in the government. That all the states would be equal on say no matter how small or large the state was.
The constitution is our plan for government. The articles of constitution talk about the duties of our three main parts of government, the Executive branch, The Legislative branch, and the Judicial branch. It also talks about the separate of powers of the federal and state government.