Also factored in is hour many hours/day you're riding. If you're rolling at first light, minimizing stop time, and riding to sunset, it's one thing. If you're coming out of your sleeping bag at daylight, stopping, eating long lunches, and trying to get into camp before dusk, it's another.
The big plus of the trail is lack of time and energy spent navigating; that's worth some time.
Having said all that, those are still pretty big mileage days in the conditions. It's good to have a plan, but also good to be flexible when things don't work out, like a sore knee. That calls for a super short day.