Brobots look like they are made from off the shelf polyurethane resin and pigment, which is then poured into a silicone mold of a mass produced toy, they are not as consistent as CC's. Every single CC will look identical to the next i.e. all single colors look the same, all dual colors look the same, and all tri colors look the same in terms of shape, mold, and color placement. They mixture used to create CC's is of higher quality as there are never hints of bubbles on the underside, or dual colored CC's bleeding from the eyes.
Experience and consistency are also other factors that seems to be forgotten, as Brobots has only been out for not even a year and the creator has only recently purchased the machinery; whereas CC has been making these skulls for a good 3-4 years, if not more. CC's have been perfected over time from countless batches, and quality products have been consistently created. CC has been in the keycap creation business since before most of the market even knew about the possibilities associated with mechanical keyboards.
I also don't think that the creator of the Bro bots would say that the material he uses is neither better nor on par with what is used to make CC's. Bottom line is I would not believe a rookie would be able to produce the same quality product as someone who has been doing this for much longer. 3-4 years from now maybe I will consider it, but as of now it would be a little ignorant to value the two products the same.