It's more complex than that. Alito suggested that factors included the amount of tracking, so tracking a car for a day would be different than tracking it for a month or a year.

So the 5 justices might differ between whether a warrant would be required for "show me all records of where this cell was for the last year" and "show me where this cell was during the day that such-and-such of a crime was committed."

I don't think there is any question that the scope and length reaches to a point where Alito's concerns or Sotomayors would be major factors though. These are huge, dragnet surveillance programs of the sort that I think worried at least 5 justices (and may have worried all of them). Collecting CDRs on all Americans on a daily and ongoing basis along with cell site location info is more intrusive than tracking a car for a few months.