The first question to answer is what SOL is most suitable for a nonlinear analysis. Can you describe what kind of problem you want to solve? As you know, Simcenter offers multiple nonlinear solutions in order to accommodate the user's need best. SOL701 is the explicit solver for transient, dynamic analysis.
Since Advanced Nonlinear Solution handles both Solution 601 and Solution 701, the inputs are very similar. Please have a look to chapter "1.2.1 Choosing between Solutions 601 and 701" of the "Advanced Nonlinear Solution - Theory and Modeling Guide" for a comparison.