spineless

I use a canon xm-2. When shooting outdoors, during a sunny day, I can eliminate the "burned picture" effect due to the sun, by using the on-camera ND filter, or by decreasing the shutter speed (from 1/50 to 1/1000 for example). I noticed some visual differences and I would like to be enlightened some more on this subject. What are the visual and the aesthetic differences between these two practices?