LMich changed the height. What Emporis did is took the height (48m) and converted it to feet (157.48ft, rounded down to 157ft) to display both heights on its building page. What LMich did is look at the height feet (157ft) and converted it back to meters (47.86m, rounded up to 47.9m.) It's like translating a sentence from English into Danish and then back to English. Things are lost in translation.
Aside from that, Emporis, the cited source, says 48m, so it would be a bad reference to not use 48m. It's also a secondary reference--I put down the building's official website (a primary reference) and he changed it to Emporis. It's like quoting a newspaper to quote a report instead of quoting the report itself. (I edit on Wikipedia a lot, and we're advised to not do that.) You end up with slightly innacurate information.