there is no specific canonical information about a "Romulan mind control device" or a "Vulcan mind control device" in the Star Trek universe. However, I can provide some context based on the general traits of the Romulans and Vulcans in the Star Trek franchise.
Romulans and Vulcans are two distinct species in the Star Trek universe, but they share a common ancestry. Romulans originated from the same ancestors as Vulcans but chose a different path, embracing emotion and passion rather than following the path of logic and emotional suppression that Vulcans adopted.
Vulcan Mind Control (or Mind Meld): Vulcans possess a telepathic and empathic ability called the "mind meld," which allows them to create a telepathic link with another being. Through the mind meld, a Vulcan can share thoughts, emotions, and memories with the other person. The mind meld is often depicted as a touch on the face or head, and it requires the consent of both individuals involved. It is typically used as a form of communication, understanding, and empathy rather than a means of control.
Romulan Mind Control Device: there was no specific canonical reference to a "Romulan mind control device" in Star Trek. However, it is common for various factions and species in science fiction, including Star Trek, to explore technologies related to mind control or manipulation.