Christie is basically a more economically-orientated version of Rudy Giuliani.
No way. I'm sure that the expectations for Christie are overblown, but Giuliani's status as a national hero running for President is unique in contemporary politics. Giuliani's stature was like that of a general returning from war - an Eisenhower, a William Henry Harrison, a Zachary Taylor. There is no other politician in either party who could do so well despite being so out of line with the base on basic, important issues.
(The comparison isn't a total bust, don't mistake me, but Giuliani's candidacy is really different from anything that we've seen.)