I am confused by the way contradicting statements have been mentioned about Milestone charts and Bar Charts in PMBOK and Rita Mulcahy's Exam Prep.

Rita's book mentions that Milestone charts are used to report to Management due to their uncomplicated way of potraying performance whereas Barcharts are too detailed in nature and hence are shared with the Team. ( Pg. 214 - Rita )

PMBOK mentions that Bar charts are used to report to Management. ( Pg. 157 - PMBOK )

Can someone in this forum shed some light?