sc4001992,
In 2020 I started to pick Gold nugget in March, and end in May, the sweetness increased with time with no obvious overripe or texture or dryness changes. Probably because I left the fruits on tree too long, the tree didn't get much flowers in 2020 spring.
Will be interested to hear your comparison for Sumo, Ponkan, Honey (CA), Murcott, Shasta, Kiyomi, Iyo Mikan, and Gold Nugget.
Eric