Does anyone have insight into bank mandate performances (Vermögensverwaltungsmandat)?

I spoke to a friend who has around 1mio CHF in a mandate and I told him that I think this isnt the most efficient way to invest because of high fees especially accumulated over yeras.. I just tried to find more information on the UBS and Raiffeisen website and couldnt find the performance factsheets.

Does anyone know what a 100% equities mandate makes compared to Vanguard World Stock?

Thanks!