Hi there! What a great question. Obligatos are generally fantastic strings! May I ask how long you’ve had the strings on your violin? Obligatos are known to have a fairly long break-in period where they’re pretty bright, as do many synthetic strings like them. After about a week of regular playing, they will mellow out and have a nice, warm, and complex tone. That’s typically what folks report when they have them on their instruments.
As for the Visions, they’re actually brighter than Obligato after they settle. Dominants have a metallic tone when they’re first put on, but also mellow out. They don’t have as dark of a broken-in sound as Obligato, though.