the effects of toothpaste are minimal. the important factor in oral hygiene is the act of brushing itself. however many people with sensitive teeth such as yourself find a relief in using "sensitive tooth pastes" such as pronamel and pro-health (i just used it to brush my teeth). if you like the flavor and find a relief either do so. you do not have to use another brand if you find pro-health appealing.
my dentist suggested pronamel tooth paste to deal with acid erosion. would crest pro-health also work?