Thanks for the post. It should be a close race as both are owned by the same parent company.
Widex seems to have slightly better Bluetooth sound. Their AI/Machine learning also seems to be the best available, maybe the only one with machine learning.
The biggest factor will probably be tinnitus. While Signia’s Notch Therapy seems like a good approach I wonder if it is possible to setup multiple notches. I have at least three tones and one drifts as I can detect it beating against another one. So I think masking will work better. In fact I have found that any stimulus helps. I have found while experimenting with tone generators to determine my tinnitus frequencies that they are elusive, they tend to diminish when playing even very low volume tones.