To address the original question, I can't see an argument for Chromite (when compared against Vanadium).
If Graphene has earned your trust and Vanadium is a part of the package, concieved by and maintened by GOS team with DM's insights, then I can't see how one could not see it as the best option bar none.
Especially since it includes other, not insignificant, minutiae, such as self-updated, always current, trusted code (none of these 'should I get it from FD or GH or PS or Aurora', no having to consider updating mechanisms, signature trustworthiness, tracking, etc.).
Needless to add, Vanadium is my primary browser.