My take is selloum philodendron. I have a bunch here in Ft. Lauderdale that I've had forever and are about 10 feet tall. They take a lot of pruning not to get huge but you can't kill them once they're established.

I know it’s been two years but would love to hear an update. Did you get fruit? Mine flowered and fruited for the first time this year. And I’m in Oregon! sorry, photo is importing sideways

Usually orchard fruit cultivars need to be identified by the aroma, coloring, consistency, flavor and shape of the ripe fruits. Also with many of them a good indication of ripeness is when numbers of fully formed fruits begin to drop from the tree. And with mangoes in particular I'd expect the dropped fruits to be generating an aroma or odor of ripeness.

Is there a list of varieties on the seed package or from the supplier? You could do an image search for those to compare with what's growing. There are many kinds of basil. And scent can be an indicator too - like if it's lemon or lime basil.