He's aware of the organic Brainy's attention, and it prompts him to show off a little. His arm is still missing from below the elbow and he glances at it, concentrating as the cybernetic/nanotech mix quickly repairs itself, working from the skeleton up until his arm is perfectly whole and functional again. He flexes his fingers once, then shoots a smug look at the inferior organic Brainy.

The effect is ruined a little when he shoots a surprised look at Superboy though. Now that he's paying more attention, there are a lot of similarities, not only to Superman, but also to Kell-El. "Another clone?" His gaze flicks to Supergirl in a moment. "And you as well?"

From how they act and what he's heard, they all clearly have more in common with each other than the people he knows. "So you're all from the same dimension?" he asks curiously. "Interesting... It raises the question as to why I was brought here as well, among other questions. Like how you came to be trapped in the 20th century. But perhaps I'm thinking about the problem in terms of my own dimension."

There's a pause and the smug look is back, directed at his counterpart. "After all, it wouldn't have taken me more than a few weeks at most to create a suitable time machine, but I suppose it would have taken you longer."

And it looks like one way they don't differ is their egos.