That's pretty much the opposite of what Steve thinks, there-- he's the same, he's always going to be "Bucky" no matter how he actually is. But it's also closer to how the Asset himself feels about the situation. He simply can't think of himself as the same person Steve expects him to be. Like there's some kind of cosmic mistake.

So he's silent a moment, staring at his meal, chewing on it uncomfortably, before he says, "I don't remember most of it. So I can't tell you much."