connoisseur
A connoisseur is a knowledgeable and discerning enthusiast. In mango tasting, that may mean comparing aroma, sweetness, acidity, texture, fiber, and aftertaste while paying attention to ripeness and the source of each sample. It is a description of experience and interest, not a formal horticultural credential or an objective ranking system. Good tasting notes explain what was observed and under what conditions, allowing others to compare preferences without claiming that one person's favorite mango must be best for everyone.