First of all, to answer the easier question, no, it is unlikely that your tickets will be struck for having a wrong color car on the citations. The car color is irrelevant to the charges. If the officer can identify you as the person who was speeding/driving recklessly, and you were properly advised of the charges against you, that is all that will really matter in court.
As for the penalties, reckless driving is the more serious of the two citations, because it can carry jail time...specifically, up to 60 days in jail and/or a fine of $50-$200. The speeding typically carries a fine of around $260.
Luckily for you, while Pennsylvania receives a report of your convictions from out of state, they do not typically assess points for what they consider minor violations. So they won't give points for speeding. It is unclear if PA considers reckless driving minor or not, but you can call the hotline and verify whether it is or is not:
Regarding the tickets, even though the possibility of jail time is there, you probably won't get any unless you have a bad driving record. Because it is a serious charge, however, I would recommend finding a traffic lawyer in NJ to handle the tickets. Most will do it for a flat fee (as opposed to hourly). A lawyer may be able to negotiate the reckless driving down to careless driving or something less serious, or may even be able to get the reckless driving charge dropped in exchange for just paying the speeding ticket. So I would suggest getting one just to protect yourself and to work a reasonable deal out on your behalf.