Main difference as far as I can see is the NYC structure is made up of pre-assembled room-size room-size units, whereas the Chinese hotel is more conventional beams, panels and cladding but pre-cut to specific sizes (and presumably also for the interior finish)
The Chinese seem to be trying to prove a point with their speed, though they do have a considerable advantage when it comes to costs and lack of regulations to adhere too though, probably aren't building to the [unusual] level of tolerances specified for the US project.
(my dad was doing this back in the days when 9 storeys was "possibly the tallest of its type in the world", and under a year for a building that size was really fast. Which really wasn't all that long ago.)
The Chinese seem to be trying to prove a point with their speed, though they do have a considerable advantage when it comes to costs and lack of regulations to adhere too though, probably aren't building to the [unusual] level of tolerances specified for the US project.
(my dad was doing this back in the days when 9 storeys was "possibly the tallest of its type in the world", and under a year for a building that size was really fast. Which really wasn't all that long ago.)