I don't see this as being at all equivalent to a 100 km round-trip commute. Doing an average of 62 miles/day on an extended bike tour seems pretty easy unless there are lots of hills and/or prevailing headwinds. But I wouldn't want to try that for a regular commute where it's also expected that I put in a good 8 hrs/day at the job and all the normal at home chores in the evenings.