I havent tried vermillion, is it similar to Boba? Boba's sweetness is very minimal to me. To me it's sweet cause it's not better, not because it has very elaborate sweetness.
The obvious brother to Boba is Gorilla
juice, which in my opinion is better. Supposedly it has banana, which I can't taste...but it gives boba the smooth, slightly creamy, feel of a banana juice.