Special, in that he's a strange, distant alternate of someone Steve would have liked to have saved. Flirting is only flirting, but he's already decided he wants to get to know him, whether on a platonic level or otherwise. (Although, let's be real, Steve Rogers is pretty slow to move on anything other than a platonic level.)

But he's never been immune to charm.

"Thief? Really? And now you save the world instead?" He should probably tell him that stealing is bad or something. And it is! It's bad. But Steve's concerns are more life and limb and planetary infrastructure these days than petty theft.

Then again, "See, that sounds like another guy I know. Scott Lang. Haven't seen him in a while, though. I hope his family's doing okay."