2003 Opel Zafira ALTERNATOR

I HAVE TO REPLACE ALTERNATOR SOON DUE TO TOO MUCH MILEAGE. OLD ALTERNATOR WORKING ON MY CAR HAS A REGULATOR OF "POSITIVE REGULATION" TYPE. NEW ONE IN MY HANDS HAS REGULATOR OF "NEGATIVE REGULATION" TYPE.
OLD ALTERNATOR IS BOSCH 0124515033. NEW ONE IS BOSCH 0124515016.
I JUST WANT TO KNOW ONLY ABOUT "POSITIVE OR NEGATIVE REGULATION". PLEASE KINDLY HELP ME.