It should not be the same in both reports. Talk time of agents is never the same as talk time of prospects. Don't forget overlap with consultation calls and transfers. Plus the concept of parked / on hold which may or may not count depending on whether there are still some parties in the call or not.
Your best bet is some carefully planned test calls with specific times for various activities, then check the reports to see which numbers appear to meet your need.
Pause, Park, Hold, Transfer (Blind), Transfer (Consultative), Transfer (3-Way) ... all can have an effect. Test them all.