It could have read 2900 gribloops vs 3100 gribloops and, not knowing anything about gribloops other than it's a measure of distance between cities, the expected conclusion is the same: the two pairs of cities are roughly the same distance apart. Ergo, converting the units presents no additional information.
It put things into a frame I understand though.
You don't understand the concept of somewhat longer units of length than those you are used to?
I really have no idea what 200 miles represent. It's like if I start talking in Yen to you, you would have to convert that to the US$ if you're not familiar with it.
No I wouldn't. If you complain to me that you make 1000 Yen per hour but your coworker with the exact same experience doing the exact same job makes 2000 Yen per hour, I don't need to know the value of a Yen to understand that you're being shafted because you only make half of what your coworker does.
In the original comment, the point was that Europe was small but the USA is big. To rephrase what was written, the distance between the two American cities is 1.07 times the distance from the UK to the Middle East. The actual measurement, whether expressed in planck lengths or lightyears, is entirely irrelevant.
2900 miles = 4667km
3100 miles = 4988km