If the Cabin Crew are strapped in, then they're not standing by their respective doors, and thus aren't at their stations. If the intention is to taxi clear of the runway after the stop, then you need a different PA to ensure that they remain seated and don't open a door in the excitement of the moment.
If the published call is "Stopping" then using an airline specific different call may cause confusion - do you want to declare an emergency or not? The tower would probably call the fire services for a high speed stop in any event, I would think.