My mom wants people to know that Sumo Citrus fruit are still very good to eat when the top-knot part starts getting dried out and brown. She said Kroger marks them way down in price when that happens and puts them in the "blemished" fruit section. She loves them and doesn't want them to go to waste, so if you see them for cheap, go ahead and buy them and you probably won't regret it. Per the below articles, they are normally very expensive.
She gave me some, and I agree they are quite good. I wouldn't say they are better or worse than oranges and clementines; they have a different, unique flavor similar to canned mandarin slices.

What's The Deal With These Giant Misshapen Oranges?
What Is Sumo Citrus?
Places that sell Sumo Citrus
.
So many different kinds of citrus fruit:
https://en.wikipedia.org/wiki/List_of_citrus_fruits
She gave me some, and I agree they are quite good. I wouldn't say they are better or worse than oranges and clementines; they have a different, unique flavor similar to canned mandarin slices.

What's The Deal With These Giant Misshapen Oranges?
Why's it called "Sumo citrus?"
Ah, this is a fun one. Well, it's Japanese in origin (like Sumo wrestling), it's bigger in nature (like a Sumo wrestler), and it's always got a little top knot-type bump on its head (see the last parenthetical).
What Is Sumo Citrus?
Places that sell Sumo Citrus
.
So many different kinds of citrus fruit:
https://en.wikipedia.org/wiki/List_of_citrus_fruits