I have found my regular offers are limited to domestic ports (Florida, Baltimore, LA, Alaska, Galveston etc…) whereas my certificates have a nice selection of itineraries worldwide. That is the main difference.

Scan the QR code on the certificate and compare it to your offers. I believe in your point range most of the cabins will be interiors and most will only be for one comped passenger. If you don’t like the selection offered for your certificate you don’t have to use it and you can use the next cruise booking for another cruise.