I thought Ambrosia Orange beat Sun Gold on flavor. I didn't grow them side by side, but I think it is probably slightly later and lower-yielding. Early fruit were excellent, but later fruit got tough skins, probably from too much sun in hot dry weather. My white flies have a sweet tooth - they are always noticeably thicker on sweet varieties. Ambrosia Orange was a white fly favorite.
I actually like Ambrosia Blue the best, mostly because the fruit are much larger:
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