It sounds like there is some confusion about growing citrus in the tropics and I have some experience with numerous cultivars and types grown between 35 and 12 latitude.Assuming all other factors are equal I am confident of the following.
My minneolas grew huge navel like fruit that never coloured or formed the bump.Poleward of 23 latitude they start to get proper colour,flavour and shape.Navels of mine were also pale,lacked flavour but were huge and also preferred subtropical and cooler climates.The same grapefruit types are sweeter and better when grown in the tropics and pomelo are way better when grown within 20 latitude of the equator.
Navels only yellow and can regreen at my place (16 55') and lack a bit of acid but are alright.In Cairns some mandarins (tangerines) are excellent like emperor,ellendale (tangor),honey murcott and hickson but most that need chilling for colour and flavour are poor and trees are sickly like freemont,afourer,imperial,satsuma types and many others.Blood oranges are hopeless in warm humid climates.For wide ranging citrus types skin is thicker,colour is often deeper and there is a higher acid content at cooler parts of the 'envelopes'.Wet and dry climates also cause noticeabley different fruit characters within a variety.
The moral of the story is select varieties of citrus that best suit your climate for success and good fruit.Sorry to ramble folks.