Yes of course. I think of shortness of breath like when you exercise intensely and you create a shortness of breath that you try to catch when resting. It’s not extremely unpleasant, it’s just labored from exercise. Or if someone had a condition like COPD or other lung conditions that can cause breathing to be labored and more difficult. Dyspnea would be more of a sensation of a need to take a deep breath; but that deep breath may not satisfy the air hunger and so you’re left with a feeling of empty lungs. This happens at rest and when the breathing rate is normal but the sensation of needing air is still there. Hope that makes sense