The bottom line is it just depends on how it was maintained. Properly maintained, the mileage is irrelevant, at least in the range you're looking at. But improperly maintained, the mileage is ALSO irrelevant. I'd buy my bike with 62,000 miles on it before I'd buy a thrashed, ill maintained one with 1,500 miles on it.
The single, best test you can do to judge the health of any engine (except two-strokes) is to have someone start it in the morning, when it's cold and hadn't been run yet for the day. If the motor is healthy, it shouldn't blow any smoke. If you get a puff of white or blue smoke coming out immediately on startup (not condensation steam, which is normal) then there is some type of wear issue going on.