If madhurya rasa is taught in other traditions, then what is unique about the Gaudiya tradition?

From Divyangi Lalita M

I was under the impression that only Gaudiya Siddhanta teaches madhurya rasa, but I was recently corrected by a devotee stating that Andal from the Sri sampradaya was situated in madhurya rasa. Can you please explain on what basis we can convince new devotees about the supremacy and unique position of Gaudiya Siddhanta?