>>7891288It was just a rebranding, but it is helpful if you're new, in the sense that you generally know that a "Construx" set is going to be relatively modern and well-done, but with a "Bloks" set you really need to do your research because some of those older sets and figures are kinda janky.
Like, look at this for example. An early Bloks-era Halo figure on the left, and a Construx-era one on the right. Way better proportions, better articulation, and a buttload of removable armor that can be swapped between figures.