  Stealthy Coronal Mass Ejections (CMEs), lacking low coronal signatures, may
result in significant geomagnetic storms. However, the mechanism of stealthy
CMEs is still highly debated. In this work, we investigate whether there are
differences between the stealthy and standard CMEs in terms of their dynamic
behaviors. Seven stealthy and eight standard CMEs with slow speeds are
selected. We calculate two-dimensional speed distributions of CMEs based on the
cross-correlation method, rather than the unidimensional speed, and further
obtain more accurate distributions and evolution of CME mechanical energies.
Then we derive the CME driving powers and correlate them with CME parameters
(total mass, average speed, and acceleration) for standard and stealthy CMEs.
Besides, we study the forces that drive CMEs, namely, the Lorentz force,
gravitational force, and drag force due to the ambient solar wind near the Sun.
The results reveal that both the standard and stealthy CMEs are propelled by
the combined action of those forces in the inner corona. The drag force and
gravitational force are comparable with the Lorentz force. However, the impact
of the drag and Lorentz forces on the global evolution of the stealthy CMEs is
significantly weaker than that of the standard CMEs.
