Better Results with Separate Sound Classifier Models?

I'm working with MLSoundClassifier to try to look for 2 different sounds in a live audio stream. I have been debating with the team if it is better to train 2 separate models, one for each different sound, or train 1 model on both sounds? Has anyone had any experience with this. Some of us believe that we have received better results with the separate models and some with 1 single model trained on both sounds. Thank you!