Stopped by Target before earlier.
They had the "Jurassic World" Slash 'N Battle Scorpios Rex ($24.99) in stock.
It is significantly larger than the one that comes in the pack with Kenji and the Gyrosphere as shown in the second image.
The larger one's articulation is tied to a pair of action feature buttons. The first button, higher on the spine, controls a slashing attack with both arms as well as a lunge and snap of the head and jaws. A second button, lower towards the tail, controls a side strike from the tail. The only articulation that moves freely is the legs. So if you want superarticulation, go for the smaller one in the pack with Kenji.
Personally, I want both to be different individuals. I have the smaller one already and will get the larger one next paycheck when I have more fun money.