When picked early in the season Little Gem reminded me of Carrie with a strong resin component (one of my least favorite mangoes. Not because of the resin,it was just too mushy)
Little Gem had the Carrie flavor with a firmer texture. Later in the season it tastes different,the resin is subdued. I gave some fruit to about 10 forum members last season, one actually thought it had too much of that resin/spice flavor profile that they did not enjoy even fairly late in the season. Everyone else thought it ranged from pretty good to fantastic.
At various stages of maturity and ripening during its long season, it reminded me at times of Julie and Graham. I like both of those but I think Little Gem is better than those despite some similarities. Little Gem can have a good coconut essence when completely ripe late in the season.(and little or none before that)
I could pick well before mid July, but to me that is the sweet spot to open its picking window.
Depending on your taste preferences, picking times,and time it is finished off the tree before eating, it can be like having several varieties on one tree. Just eat it at the stage you prefer. If you only have room for one tree this can be an advantage once the tree matures and produces more fruit than you can eat at once by extending your potential harvest period.