More like the latter, but not exactly (and that's my fault, sorry). As I said, 2048 is primarily distinguished from Threes by its title which implies the clear milestone. While the author of 2048 probably didn't intend this---after all, it is a clone of another clone 1024---, it seems that the Threes team also overlooked this to me. The title Suika Game also seems to share this quality probably by accident, which was what I originally meant to say.