From my observation, the Moro is a smaller and rounder fruit than the Sanguinelli, which is larger and more oblong.
IMHO citrus in general seems to do better in the ground than in containers, even the dwarf varieties. They tend to get root bound in containers and then they require periodic repotting and root pruning. Not easy with a containerized tree that is already six feet or more tall. Heavy! Problem is I've run out of room in the ground for trees, not if I want to have a veggie garden. Although, perhaps I should move the citrus to the veggie patch and re-purpose the containers for veggies. Even then, room is tight. Keeping the containerized tree properly watered is also challenge. I have them all on timers and little sprinklers, but the soil in the containers tends to get channeled and then the roots don't get as much moisture as they'd like. This is not as much of a problem in the ground, if at all.
I have a Valencia style standard juice orange tree, in the ground, that gives very sweet and tasty juice if I delay the harvest till late summer. It's basically seedless and quite prolific. Right now the garden is littered with fallen ripe fruit, but the ripe ones still hanging on the tree are delicious. This one is about 12 feet tall now, after about 12 or more years.
The blood oranges in the containers have always been a bit on the sour side. They get enough sun, so I think it's probably they don't get all the soil and water conditions for proper ripening before they start to dropping off.
I have a Washington navel tree in the ground by the fish pond. The soil there is so-so but well drained (raised up about 2 feet) and it's flourished. It's also a dwarf but has gotten about 8 feet tall and just as wide. Periodically I have to prune it to keep it balanced and prevent it from toppling or impeding the adjacent walkway. That fruit is also tasty. Not as sweet as the Valencia but still good.
There's a another variety in containers, called the Shamouti or Jaffa. It has lovely large leaves. But not much fruit. I think it's unhappy in the container. It's supposed to be as good an eating orange as the Washington.
If I could I'd buy an empty lot and fill it with fruit trees...
One good thing about the citrus is the squirrels don't seem to attack them like they do the figs, avocados, nuts, etc. However I have had roof rats hollow out oranges. Out comes the Decon at that point...
