Yes the ownership is the same, but the cap hit is what matters for us. If NYCFC are paying all of their salaries during the loan they might be taking up significantly more cap. I'm pretty sure teams can pay only a portion of a player's full salary while on loan, though, so I'd imagine we're paying them the bare minimum while Man City foots the rest of the bill officially (CFG is paying for both teams, though).
On a separate note, I mentioned this on another thread, but could we add Williams to the season long injury list to save cap space plus a roster spot? Last I knew (it's been a while) wasn't he dealing with possible career ending health concerns? He certainly hasn't been on the field in months.