lgbg,
I think you might need to clarify this with yourself. If you wear sleeves that cover your elbow, and a member of another group of Yiddin are not careful with covering elbows (simplistic example, for illustrative purposes only), are you dressing differently, or “better”?
Are there some practices that are objectively “better”, such as adherence to halachah, or are all choices simply “different”? Not referring to the people practicing them, who may or may not be “better” than the next, which is not our place to judge.
No need to lord it over other folks, and discuss this, unless there is a possibility the individual will remediate the tznius infractions. Nevertheless, if you feel your dress is merely “different”, and not for the purpose of being in consonance with halachah, and if you feel tznius infractions are mere “differences” in dress, I think some reflection on your understanding of Judaism is in order. I mean this sincerely, and hope it is received in kind.
Naturally, I am ONLY referring to actual breaches in tznius dress; there is no need to discuss the specifics here.