I should contextualise my Blurr > Hardhead comment.

Hardhead has an excellent play pattern within the remit of the Titans Return line. The way the minifigs interact with the larger robot is delightful. I especially love how they can man the main gun. However it does suffer from some of the drawbacks of the post 2011 figures - hollow limbs, slightly rickety feel.

Blurr, which also being a headmaster, is a much more straightforward deluxe figure. Paint aside (and I am aware that that's a killer for some people) he doesn't suffer from the same drawbacks. He's solid in both modes and doesn't have big empty spaces. The headmaster figure interacts with him in slightly more mundane ways.

Blurr is a better figure by far, even if his Titan Master interactions are not as interesting.