The speeding ticket you received in Philadelphia will be assessed on your New Jersey motor vehicle report. Since it's an 'out-of-state' violation, only 2 points will be assessed against your driving record. However, if this were an 'in-state' violation, this would be a 4 point violation.
You can comparison shop your policy here whether it's Philadelphia auto insurance or New Jersey auto insurance or insurance for any other state.
Comment Update: The question has been corrected, we apologize for the incorrect point assessment.