It's probably not entirely fair to compare the projects, since the Kobe statue-- in commemoration of the city's revival after the 1995 earthquake –is a permanent fixture, and I believe one that won't have any flashy lights or other effects going on, while the Gundam, of course, is going to be short-lived but moves and lights up.
Still, the two projects going on around the same time simply invite comparisons. The Tetsujin-28 statue isn't up yet (its official installation opening is October 4th, after the Gundam gets taken down), but ANN spotted a video of the construction of the piece:
And here's a repeat of one of the Gundam videos, for your reference.
Which would you rather go see?