I tried about 40 different mango cultivars this summer, looking for the best tree to plant in my backyard, and Sweet Tart is currently #1 at the top of my list.
The mango is not pretty (green and turns yellow when ripe), small, had a poor flesh-to-seed ratio (fat seed)... but my tastebuds really love and crave it. It has a definite "flavor burst," as Harry described it. Once I cut into it, I have an incredibly difficult time saving some for later.... which is something I often and easily do with other mangoes. This inclines me to select it for planting.
Tasting notes: Coca Cola syrup with a splash of Limeade concentrate on top of some richest, sweetest classically "mango" flavors. Little bursts of Sour Candy flavors near the peel.
If you eat it a little underripe, the sour acidity is very INTENSE and for me... very pleasurable & addictive. Along the lines of a "Sour Patch Kids"-type candy.
A+Question: My only planted mango tree is a Maha Chanok, which I have not yet tasted. Does the MC have a tart / sour element? Does the Sweet Tart taste "different enough" than the MC to merit planting both in a small yard?