Jim talks and talks and talks. But he doesn't say anything. Unless something changes and it becomes the Carlos Files the conclusion is forgone. But I'd love to see that fight.
Who says he survives the BAT? Authors have killed off title characters before. Examples?
Doyle killed Sherlock. Haggard killed Allan Quatermain and Eric Brighteyes in eponymous books. Stasheff's Warlock's Last Ride, well, guess who was not riding at the end. I am Legend.
Speed and grace work nicely, but monster power can be effective too - Game of Thrones.... trial by combat ... guy was beating the Mountain, even if not for the envenomed weapon, made one mistake.. Mountain crushed his skull.
Could Carlos take Harry? By ambush, sure. Kincaid could. Maybe if he could set the field. Straight up? Money's on Harry. Lions have killed elephants. Bigger they are the harder they fall? Sure. Doesn't say they fall anywhere near as often. Big power. And for those who say Harry took Fix by using iron.... yes, he did - but maybe he felt if he had to he could take him - but maybe Fix would not survive that way.