This method is suitable for all bush roses, whether they are hybrid teas or floribundas. If you have a bush rose, and don’t know what type it is, the best way to tell is by looking at the flowering habit.
Both types are repeat-flowering. Hybrid tea roses, (also called large-flowered roses) usually have only one flower per stem and tend to flower in three flushes from summer to late autumn. Floribundas (also called cluster-flowered roses) have many flowers per stem and tend to repeat-flower continuously from summer to late autumn.
If you inherit an overgrown rose and don’t know what type it is (and don’t want to wait until summer when it flowers), it is best to prune as for a hybrid tea.