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Sungold vs Sweet 100

This is the cherry-tomato question everyone asks. Both are F1 hybrids, both crop heavily on tall indeterminate vines, and both are beloved for sweetness. The real differences are color, the exact flavor, and how the fruit holds.

SungoldCherry
Sungoldhybrid · 60 days · EarlyCatalog and grower descriptions put Sungold among the sweetest cherry tomatoes grown, intensely sweet and fruity, almost tropical, measured at roughly 8 on the Brix scale. Flavor is subjective, so treat this as the widely repeated catalog description rather than a measured fact for your garden.
Sweet 100Cherry
Sweet 100hybrid · 65 days · EarlySold and described as very sweet, with the classic bright cherry-tomato flavor. As with all flavor notes here, this is the recurring catalog description, not a measured claim.

The quick answer

Grow Sungold for the most intense, fruity sweetness and a glowing tangerine-orange color. Grow Sweet 100 (or the disease-resistant Supersweet 100) for classic red cherry flavor, enormous trusses, and tougher skins.

Flavor and fruit

Sungold is widely described as among the sweetest cherry tomatoes grown, almost tropical, on small orange fruit. The tradeoff is thin skin that splits readily, so it must be picked promptly.

Sweet 100 is very sweet in the classic red-cherry way, borne in long branching chains. The Supersweet 100 selection adds fusarium, verticillium, and tobacco mosaic resistance, and the fruit is a touch firmer.

In the garden

Both are vigorous indeterminate vines that need strong staking or caging and crop until frost. Both are early, around 60 to 65 days. Neither comes true from saved seed, since both are hybrids.

Common questions

Which is sweeter?
Most growers rank Sungold as sweeter and more complex; Sweet 100 is sweet in a more classic red-cherry way.
Is Sungold open-pollinated?
No. Sungold is an F1 hybrid, so saved seed will not grow true. For an open-pollinated sweet cherry, look at Black Cherry or Isis Candy.

Sources