Honors classes have the advantage that most of her peers will WANT to be in that class, WANT to learn and that controls how interesting the class is, how the teacher is handling the class,… So I recommend taking it.
In my experience, for high-achieving students, the honors level will not truly add much as far as difficulty, rather it will eliminate a lot of frustration with and distractions by other students!
It’s different from AP classes, where the time-table is much condensed, the expectations are high and teachers have little lee-way to adapt the class to accommodate who might be taking the class that year.