>>10563169They're technically two different characters - the Red/Black one is the original Rhinox Tankor from Beast Machines, while the Yellow/Green one is from the Universe comic, where he's an alternate-universe Tankor chassis piloted by 'someone else's Spark'; Ask Vector Prime (take it with a grain of salt) goes on to say the Spark in question is a version of BW Scorponok from a timeline where he and Terrorsaur didn't end up falling into lava, and where he and Obsidian teamed up to murder Megatron and conquer Cybertron for themselves. I liked the mold enough to get it twice, and even though it's not accurate at all to the show model, it's far larger and more intimidating than the more show-accurate version of Tankor that came later (seen here on Autobot Stockade, who is also from the Universe timeline/toyline, but who sadly didn't make it into the comics alongside their partner Magna Stampede for some reason).
The scarier looking cannon, spinning sawblades on the wrists (which can be exposed to attack people in vehicle mode as well), light piping and moving mono-eye in both modes, moving robot jaw, and the fact that it feels sturdier overall makes the bigger toy the superior mold in terms of playability, even if it doesn't really look like Tankor.