All I know is that I have NEVER had any oranges, tangerines, etc. that were even close to the Mandarin oranges grown in China (ripe at Chinese new year). These are the most delicious citrus from the orange family I have ever had! Easiest to eat, most addictive, AMAZING!
(Grapefruits are my favorite citrus but those Mandarin oranges are a close second, and I dearly love a GOOD lemon squeezed in water or delicious lime squeezed on guacamole).