I used to work in Construction Management on the structural concrete side, so I can weigh in (a little) on possible reasons why the CIP (cast in place) tower se

I used to work in Construction Management on the structural concrete side, so I can weigh in (a little) on possible reasons why the CIP (cast in place) tower seems to be going up faster. Generally, CIP vertical structures have minimal changes from level to level, so as the building goes up, the construction crew (generally Carpenters, Rebar/PT laying crew, and concrete placers/finishers) will become much more efficient at their work. Also, there will be minimal 'fine' work on creating floor plans on a CIP deck, it will be a primarily flat surface, excepting stub walls (for steel stud walls), utility penetrations, possibly other stubbed elements for vertical shafts and etc., elevation cuts, and sloping. The structural concrete sequencing is such that the bare core structural body is formed first, and other trades will populate it to create the finished product later on. With wood framing, I am not too familiar with the process, but I believe many of the stud walls have structural properties, and in general much more of the finished 'shape' of the floor will be done in the wood framing process from level to level.