"Oh, it's not too hard to understand," The Ninth Doctor insisted with an easy smile, looking Ten over with a cool eye and a quick head-to-toe again. "No, really, what's with the suit?" But he was distracted easily enough, plucking some at his jumper as he glanced back at Ianto and Jack. "Jumpers are much more easy to blend in with-- my, look. Suits must be in fashion." That was said as if he'd just discovered that Ianto was wearing a suit, as well. Neither here nor there, though, as blue eyes swung around back onto Ten, then skipping over again to Rose.
His Rose.
"But look at me, I'm just the daft old man of the group. We've got a newer, younger -- look at that, he's got more hair, too. Puffed up like a Rooster. What was I thinking?" That last part came with a more curious expression, but it was wiped away with a wider smile, showing teeth now. "I'm fantastic." And perhaps there was the reason, right there, that when he regenerated that he picked out that suit and made his hair stick out at odd angles like that. Time was a big ball, never falling into some neat straight line.
"We're the same person, essentially, the same consciousness, but we're different when it comes down to it. Different body, different taste in clothing, different ideas. Different feelings, at times. This has happened once before, more than two of me. Well. Us." But it didn't look like he was interested in explaining further. Where as Ten loved to show off how brilliant he was, Nine had always just.. let things go. Like now. Leaving everyone to wonder.