Im probably having brain fart but I thought shape of the teeth pattern on Xingu is more v shape than u. Looking at the pic looks like its v shape. Or maybe I switched it? I don't have my laptop now for easier search on.my older thread.
Eitherway its a nice one
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This was what a user one Arofanatics said. "Many Royals look quite similar to Xingu but notice that the Xingu have a more pointed head and their teeth is u shape. There are some big L190 in the market now that is name L27. If you look carefully they have more rounded head when view from the side and they have v shaped teeth."