If you are having speech difficulties, chances are seeing both would yield the best results. Many research papers have demonstrated that multi-modal approaches to recovery show the best results. Speech pathologists often work on a wide range of communication goals, both verbal and non-verbal, whereas a Music Therapist is likely going to work predominantly on verbal communication. This can be a good team approach and allow for each therapist to compliment the other. Many of my clients have come to me after being discharged from Speech Pathology. However, as soon as there are improvements in verbal communication I recommend being re-evaluated by an SLP.